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iSSfFI 



ANNEX KING 

TO 

FOURTH MARINE DIVISION 
OPERATIONS REPORT 

IWO JIMA 




4th ENGINEER BATTALION 

REPORT 




30 y^a^ h<*~ 



INDEX 

SECTION TITLE PaGE 

I PLANNING- AND PREPARE ION 1-2 

II MOVEMENT TO OBJECTIVE 3-4 

III SHIP TO SHORE MOVEMENT . 5 

IV ; NARRATIVE OF OPERATION 6-21 

APPENDIX,: 

1. OVERLAYS OF PROGRESS , (l - 4) . . . . 

2. MINE REMOVAL , . . 22 - 26 

3. WATER SUPPLY 27-31 

4. ROAD CONSTRUCTION 32-36 

V COMMENTS AND RECOMMENDATIONS .... 37-39 

ANNEX 

ABLE ADMINISTRATION 1 

BAKER . INTELLIGENCE 1-2 

CHARLIE OPERATIONS X - 4 

DOG SUPPLY 1-3 



SECTION I 
PLANNING AND PREPARATION 




glheerlsrttalion .... Operation Report .... IW JIMA 

A - ORGANIZATION . 

As in past operations the letter companies of the 4th Engineer 
Battalion were attached to Regimental Combat Teams 23, 24 and 25, 

as follows: 

Company n A w . . . ♦ , RCT 25 
Company w B n * , . . . RCT 24 
Company *C fl . . « . . RCS 23 

Headquarters and Service Company and Battalion Headquarters were 
included in the Support Group for administrative and rear area secur- 
ity purposes. None of the letter companies throughout the operation 
was ever released to parent control, 

B - TRAINING PRIOR TO THS OPERATION . 

Due to the severe losses in key and experienced engineer person- 
nel during the Saipan-Tinian operation, a complete and detailed 
training program was necessary to supply the companies with their 
minimum requirements in equipment operators, carpenters, riggers 
and all other basic specialists* Throughout the training program, 
engineering was stressed, except for the last twoweeks during which 
time the companies concentrated upon infantry and assault 'training. 

The location of the rehabilitation camp provided excellent facil- 
ities to train equipment operators since there was much road main- 
tenance to be accomplished plus the construction of a 100 point rifle 
range and an access road thereto. Mechanics, daily maintenance crews, 
machinists, welders, surveyors and all personnel required to carry 
on a large earth moving project benefited by this type of construction. 

Numerous carpentry and painting jobs were completed to provide 
sufficient training of this type. Personnel of the Equipment and 
Utility Section carried out normal miscellaneous electrical and 
refrigeration repair work, however, due to limitations of time, con- 
siderable pressure was placed upon the four water squads of this 
section to bring both the equipment and personnel to the highest 
degree of efficiency possible. 

During the period from 1 September to 1 December, a total of 58 
separate construction projects ranging from one day to two months 1 
duration were assigned the battalion and completed. The above fig- 
ure does not include numerous small services furnished units of the 
Division. 

u 

— X — 




u 




Fourth Engineer Battalion - Operation Report - IW JIMA - (cont'd) 



Two noteworthy battalion schools for the letter companies were 
considered especially valuable, these being the rigging school and 
the mine- laying and removal school. Special emphasis was placed 
upon the latter which yielded excellent returns on the operation. 
A Division S.O.P. on mine and minefield marking was conceived, 
written and published, and each platoon of this battalion was trained 
in accordance with this directive. All types of Japanese mines 
combined with every conceivable type of booby-trapped fields were 
laid and removed with most satisfactory results. 

The above described training of this battalion was conducted 
after a complete reorganization of the Headquarters and Service 
Company to comply with the new Table o£ Organization of the Engineer 
Battalion resulting from the disbandment of the Division's Engineer 
Regiment, the Twentieth Marines. 

C - EQUIPMENT PLANNING- . 

Upon receipt of notification of the target, a complete study was 
made of the intelligence material available with a view to taking 
only such equipment deemed necessary to support the operation. The 
equipment as shown in ANNEX 11 DOG of this report was decided upon at 
a joint conference of the Battalion Staff and the Company Commanders. 
In general, after considering the area occupied by this Division ajid 
the time required to complete engineer missions assigned during the 
operation, it can be safely said that the equipment carried for this 
operation by this Battalion was adequate. 

D - MANEUVERS AND REHEARSALS . 

Due to the nature of the work performed by engineers and the 
attachment of the letter companies to the Regimental Combat Teams 
precluding the operation of the battalion as a unit, very little 
was gained from the various CPX ! s which were held prior to embarking. 
Command post procedures and installations were used as on previous 
operations and were found to be adequate. 

Ship-to-shore rehearsals at the base camp provided some training 
for the letter companies, however, due to the crowded beach condi- 
tions, Battalion Headquarters and Headquarters and Service Company 
were not landed. Radio communication was established with the 
engineer letter companies and with the Division and proved satis- 



factory. 





- 2 - 




SECTION II 
MOVEMENT TO OBJECTIVE 




A - REHABILITATION PERIOD . '.. 

Tue to the restriction placed on the TOP SECRET r>lans and orders 
no briefing was provided for the enlisted personnel during this per- 
iod. Rifle inspections and supervised athletics for the men were 
conducted daily after which 25 t>ercent of all personnel were auth- 
orized liberty. 

A conference was held with the Company Commanders to issue final" 
instructions ai<d to make certain that all equipment was accounted 
for on the various? shit>s to which it was assigned. 

A conference galled by the FMF,Pac, Engineer Officer was attend- 
ed by the ir AC and the 4th and 5th Division Engineer Officers to 
discuss final plans fur the coordination of all engineering work 
which was to be accomplished on the island. 

Numerous conferences were attended on the Division command ship 
at which time recent changes in the plans or important phases of 
the unloading and landing plans were discussed and emphasized. 

It is believed that the rehabilitation period at Oahu for this 
operation was of sufficient length to provide all units an oppor- 
tunity to prepare themselves for the pending operation, 

B - SHIPBOARD TRAINING . 

Upon leaving the Hawaiian Area an intensive briefing program 
was conducted for all of the Headquarters and Service Company 
officers aboard the APA 157 by the staff of Battalion Landing Team 
1/25 and all attached units. All officers attended these school 
periods, the subject matter of which covered all orders from the 
Fifth Fleet Order to the Battalion Landing Team Order. School was 
held for the enlisted men after the officers' classes during which 
time pertinent information i^as passed on to the troops. Officers 
and men of the letter companies, attached to the Combat Teams, 
received the same type of instruction while aboard their ships. 
It Is gener^I.ly believed that all hands received more detailed 
information concerning this operation than any other thus far. 

On all ships the relief models were available at all times to 
email grouos of enlisted men at a time under the supervision of an 
officer who covered the nhases of the landing, answered questions 

UiiULRUUti nJL 



^jl^V^^nln^neer Battalion -.Operation Report - I WO JIMA - "(cont'd) 



and in general, portrayed the initial phases of the landing. Ter- 
rain features and orientation land marks were pointed out to further 
acquaint the personnel with the target. 

C - FO RWARD AREA REHEARSAL . 

As in the Hawaiian Area rehearsals, Headquarters and Service 
Company and Battalion Headquarters were not boated, however, all 
orders were prepared in accordance with the rehearsal plans* The 
1 9tter companies were all boated and no changes were required in 
the original plan. 



SECTION III 
SHIP TO SHORE MOVEMENT 




Headquarters and Service Company and Battalion Headquarters were 
both to land "upon order 11 . The order to land was to be received 
from the Support Group. Due to the fact that this company had no 
assurance as to the type of landing craft which would be used from 
ship-to- shore, it was necessary to have it divided into platoons, 
sections, and boat teams. This system provided sufficient flexibil- 
ity to land organised tactical units with officers in charge of 
each, regardless of the method of landing. 

No landing instructions were issued for this company until D/5 
when personnel boarded an bSh at 0930, received orders to land on 
Blue Beach #1 at 1030, and hit the beach at 1100. 

Company "A", attached to Regimental Combat Team 25, was landed 
by platoons, The first platoon landed in the third and fifth assault 
waves. The third platoon landed in the fourth and sixth waves. Each 
of the above platoons landed in four liVT2 f s. The second platoon 
landed at 1600 in 2 LCVP*s. Sixteen men of Headquarters Platoon 
landed at H/35 in an LCM with an armored bull-doser. The Company 
Commander and the Executive Officer landed in the same LCK. The 
remaining personnel, mostly tractor operators, landed on call and 
were all ashore by the evening of D/7. 

Company W B M , attached to Regimental Combat Team 24 which was the 
Division Reserve, was landed as a company in the Combat Team Support 
Group* This wave consisted of seven LCVP*s and was the rt on call" 
wave "Easy^r The company was boated at 1430, D-Day, upon receiving 
orders from the Regiment, and w.ere landed upon order at 1900 on 
•Blue Beach #1. 

Company *G U , attached to Regimental Combat Team 23, was landed 
by platoons with the Battalion Landing Teams to which they were 
attached. The first and second platoons each landed six men in the 
second wave. The bulk of the above two platoons were landed in 2 
LVT2's each in the fourth wave. The third platoon in one LCVP 
landed with the Reserve Landing Team at 1330, on D-Day. Headquarters 
Platoon landed at 1630 on D-Day in 2 LCVP's. 



• mtssm 



i 



SECTION IV 
NARRATIVE OF OPERATIONS 




durth Eng 



attalion - Operation Report - I WO JIMA - (cont'd) 



The following narrative summarizes the daily activities of the 
Fourth Engineer Battalion from 1600 on D-l until 1600 on D/26 days 
at which time the organization had completed re- embarkation. Each 
paragraph covers a twenty-four -hour period running from 1600 on the 
first date indicated until 1600 on the second date. All times are 
local time. 



18 - 19 February 

Hq&Serv Company remained aboard ship awaiting orders to land. 

Company "A" landed in the assault with its platoons attached to 
their respective BLT's of RCT-25 on Beach Blue One, and proceeded 
to remove mines in the beach area. 

Company "B" attached to RCT-24, in reserve, boated in 7 LCVF's 
preparatory to landing. 

Company "C H landed in the assault with its platoons attached to 
their respective BLT's of RCT-23 on Beaches Yellow One and Two. The 
company cleared lanes for the tanks from the beach area to Airfield 
No. 1. The armored bulldozer worked on beach egress roads. 



19 - 20 February 

Company "A" removed mines on Beach Blue Two and executed some 
demolition missions. A pioneer road was constructed on Beach Blue 
One. 



Company "B" landed at 1900 and went into a reserve position with 
RCT-24 during the night hours. During the day the platoons removed 
mines on Beaches Blue One, Yellow One and Two. 

Company "C" continued their mine removal operations on the 
Yellow Beaches. Company "C" 's armored bulldozer assisted the shore 
party. 



20 - 21 February 
Company "A ,f continued to remove mines and execute demolitions in 





* * « 

— ^ - 1 ' - - 

Fourth Snglnee^w&talion - Operation Report - IWO JIMA - (cont'd) 

. the RCT-25 zone of action. Work was continued on the road leading 
from Beach Blue One. 

Company n B n removed mines in TA 166H. 

Company "C tf removed mines in TA 165K,L. The armored bulldozer 
assisted the, shore party in moving equipment. - 

21 - 22 .February 

Permission to land Battalion Headquarters and Bq&Serv Company 
was requested but the request was not granted. 

Company H A !I operated their armored bulldozer on the pioneer road 
leading from Beach Blue One. The platoons continued to remove mines, 
where discovered,- inland from Beaches Blue One and Two. 

Company * B" provided security for the RCT-24 command post. 

Company "C" l s platoons returned to engineer company control and 
executed mine removal, demolition, and road maintenance mission 
in the vicinity of RCT-^S's command post. The armored bulldozer 
- continued to work in the Yellow Beach area. 

22 - 25 February 

Requested permission to land Battalion Headquarters and Hq&Serv 
Company.' 

Company W A" removed mines and executed demolition missions in- 
land from Beaches Blue One and Two* 

Company ,"B" executed mine reconnaissance and removed some mines 
in TA 183W. The engineers provided command post security during 
the period. 

Company "C* provided "command post security, and removed mines 
from a road in TA 183B. The armored bulldozer filled shell holes 
and improved roads in TA 181X,Y and TA 164E. 

••«*•. . . . 7 HMCLASSUE1ED 




■ _ _ 

talion - Operation Report - IWO JlMA - (cont'd) 



23 - 24 February 

Hq&Serv Company, less portions of the Equipment and Utilities 
Section and Quartermaster personnel, landed at 1100 on Beach Blue 
One. A temporary CP was established at TA 166K from which the com- 
pany moved to the Battalion CP. Battalion CP was established by 
1500 at TA 165R. No equipment came ashore this date. 

Company "A" started to construct a road in TA 183W,R to the high 
ground above the quarry. Mines were removed in the vicinity of the 
East Boat Basin. 

Com-oany "B" carried out demolition missions against caves at 
TA 183W,X,Y. Mines were removed in TA 166H and TA 183F,C,W, 

Company "C" provided security for ROT- 23 's command post. The 
armored bulldozer dug revetments for 23rd Marines quartermaster. 

24 - 25 February 

Individual shelters within the Hq&Serv Company bivouac area 
were improved and revetments for equipment were constructed. Battal- 
ion equipment park was established in TA 165R. Landing of engineer 
equipment began this date, and work was started on a supply road 
between Beach Blue One and the Division dump, running through TA 165 
X,W,R,<i,V. One TD-18 angledozer was detailed to work on the Division 
supply road and two TD-18 angledozers dug revetments for equipment 
in TA 165R and for the water distillation units at TA 149C on Beach 
Yellow Two. By the end of the period, nine distillation units were 
ashore, six of which were installed and four were operating. The 
mine detail from Hq&Serv Company searched the equipment park and 
the Division supply road for mines and duds. 

Company "A ,f worked on the roads around the quarry. Mine removal 
and demolition missions were continued in the area around the quar- 
ry and the East Boat Basin. 

Company "B H 's armored dozer operated on the road in TA 165-C and 
constructed revetments for the RCT-24 quartermaster. The platoons 
conducted mine reconnaissance and deactivated and removed mines in 
TA 183V and TA 166E. 

Company H C 11 conducted mine reconnaissance in TA 183F and TA 183U. 
ppyeral #in^es were removed in TA 183F. The bulldozer 41 J 

' > : " - 8 - ' 





Fourth Engineer Battalion - 



Operation Report - I WO JIMA - (cont'd) 



dig revetments for 23rd Marines quartermaster. 



25 - 26 February 

Grading of the one lane road from Beach Blue One to the Division 
dump was completed and 100 feet of beach mat laid at the beach end. 
Excavation work was started at the proposed Division Hospital site 
in TA 165K,L. A reconnaissance party investigated the quarry at 
Tii 183¥ and found the material suitable for road surfacing. One 
TD-18 angledozer worked on the Division supply road, one TD-18 angle- 
dozer was assigned to Company "A 1 * for forward area work and two TD18 
angledozers continued the work at the Division Hospital project. 
Hq&Serv Company mine detail removed mines reported in the vicinity 
of the 14th Marines, command post* 

Company !, A" worked on roads in the vicinity of the quarry in 
TA 183W,R,S,T and executed demolition missions against caves in the 
RCT-25 zone of action. 

Company n B n - attached to RCT-24 in reserve, was in bivouac in • 
TA 165-0. 

Company "C" removed mines in TA 183F, TA 200ttf,X and executed 
demolition missions in TA 183D. Work was commenced on a road in 
TA 183B and construction of a road from RCT-23 command post to 
quartermaster dump was started. 



26 - 27 February 

Work continued on the Division Hospital project and work on the 
revetments for VMO-4 was started in TA 165K. One TD-18 angledozer 
worked on the VMO-4 revetments and one TD-18 angledozer was assigned 
to Company "A" for forward area work. Additional waterpoints were 
established at Beaches Yellow Two and Blue One, TA 149B and 165T, 
respectively. These new water points were designated Water Points 
2 and 3, respectively. All units were dispersed and camouflaged. 
Operation for the period: Units operating - 12; units under repair - 
3; water delivered - 6500 gals; water stored - 3500 gals; water 
distilled - 10,000 gals. The mine detail searched the* area of the 
Division Hospital and VM0-4 revetments for mines. Enemy shelled 
the Battalion Command Post area between 2000 and 2100, 26 February, 
resulting in .casualties numbering one dead and two wounded, Two TD-18 
angledozers were slightly damaged by fire ' re 8U f^^P f^^li^j 

*^ : : ; ^ % liiiuLfiauif hj 

«— y — 




Company "A" improved the existing road in TA 183W, removed a 
hasty mine field in southeast corner of TA. 166E, and continued demo- 
lition operations in TA 184. 

Company "B" remained with RCT-24 in Division reserve. 

i 

Company "C" remained in bivouac area at RCT-23 command post. 
One platoon cleared mines from proposed roadway skirting Airfield 
No. 2 in TA 200X. T /Jork on the roads started the previous day was 
completed. 



37 - 28 February 

The quarry was opened at TA 183W after the area in and around 
the quarry had been searched for mines. Trucks from the Engineer. 
Battalion and the Fourth Pioneer Battalion started hauling from the 
quarry at 1300. Work continued on the Division supply road using 
clay from the quarry for surfacing. Projects at the Division Hos- 
pital and the VM0-4 revetments were completed this date. One truck 
loader tractor operated at the quarry; one TD-18 angledozer complet- 
ed the work on the VMO-4 revetments; one TD-18 angledozer spread 
surfacing material on the Division supply road* Water supply opera- 
tions for the period were as follows :~ Units operating - 13; units 
under repair - 4; water delivered - 12,685 gal's; water stored - 4100 
gals; water distilled - 13,285 gals. 

Company "A" continued to improve the existing road in TA 183X 
and constructed a supply road in TA 184L. The platoons were engaged 
in mopping- up operations in RCT-25 zone of action. 

Company U B" 's armored bulldozer operated in TA 183V, ¥ and" TA 166B 
building and repairing roads. The first platoon remained in its 
bivouac area; the second platoon was attached to BLT 3-24, and the 
third platoon was attached to BLT 2-24. 

Company " C" searched the roadway from TA 1821 r through RJ 184 to 
CR 249 for mines and executed demolition missions, in TA 200Y. The 
armored bulldozer started i mo roving the road from CR 249 to Air- 
field !*o. 2. ' 




on 



- Operation Report - I WO JIMA - (cont'd) 



28 February - 1 March 



Surfacing of the Division supply road proceeded rapidly. The 
road from TA 165P passing the Division Hospital and running through 
TA 165G,H,B and connecting with the Division supply road in TA 165R 
was re graded preparatory to surfacing. Additional work on VMO-4 
rcr'wtments was started and revetments were constructed for the Divi- 
sion Signal Supply and Division Signal Company. Quarry operations 
continued. Equipment operating for the period: one TD-18 angle- 
do s or worked on the Division Signal Supply revetments; one TD-18 
• angledozer spread clay on the Division supply road; one TD-18 angle- 
do vor was assigned to Company M A" for forward area work, however it 
hi a mine and was damaged extensively. One motor patrol grader 
worked on the road passing Division Hospital. One truck loader 
tractor and 3/8 cu.yd, motorized shovel worked at the quarry; eight 
trucks from the Engineer Battalion and five Pioneer Battalion trucks 
hauled clay from the quarry. Water supply operations for the period 
were as follows: Units operating - 14; units being emplaced - 3; 
water delivered - 15,890 gals; water stored - .900 gals; water dis- 
tilled - 12,090 gals. Water Point No. 4 was established on Beach 
Blue Two. 

Company "A" was with RCT-25 in reserve. 

Company "B" attached to RCT-24 carried out normal demolition 
missions and removed minefield in TA 166A. 

Company "C" rested in bivouac area. The armored bulldozer com- 
pleted the road project started on the previous day. 



Surfacing of the Division supply road was continued. Surfacing 
was completed on the road from TA 165X through 165W,R,Q, V,U. The 
road in" TA 148A,E was graded and widened preparatory to surfacing. 
The road running through TA 165E,G,H,I was regraded and widened. 
Additional work on the VMO-4 revetment project was completed. Quarry 
operations continued. Equipment operating during the period was em- 
ployed as follows: One TD-18 angledozer and TD-18 utility tractor 
with pull grader on the road in TA 165E,G,H,I; ofie TD-18 angledozer 
and motor patrol grader on the Division supply road; two TD-18 
angledozers at the VMO-4 project; one TD-18 angledozer at the quarry; 
3/8 yard shovel and one truck loader ^ractor^^^h^ quarry; eight 
, tracks, hauling clay. Water supply operations iflfeif^ ^^f^^^F^^W^ 



1-2 March 





- li - 





ALU cvi'jiiz:^.-:-' 

Fourth Engineer Battalion - Operation Report - JWO JIMA - Oc'oht 'd) 

operating - 16; units under repair - 3; water delivered - 14,220 
gals; water stored - 3,400 gals; water distilled - 16,720 gals. The 
Hq^Serv Company mine removal personnel continued to work on all road 
and excavation projects. 

Company ,r A M attached to RCT-25 remained in reserve. 

Company "B M, s armored bulldozer worked on roads in TA 183G,B; 
165C and 166B. The first and second platoons acted as command post 
security for their respective BLT's. The third platoon execute4 
assault missions on Hill 382. 

Company w C 0l s first platoon executed demolition missions against 
caves in TA 183E. Other platoons of the company were inactive. 

2 --3 March 

Surfacing continued on the Division supply road. The road be- 
ween CR 69 in TA 166B and RJ 184 in TA 183P was graded and improved 
between RJ 184 and CR 249 in TA 183G-. The grading and widening of 
the road between the Division Hospital and the quarry was completed. 
The road from the quarry leading to Beach Blue Two was improved and 
graded. Two additional revetments were completed at the Division 
Hospital and a 32' x 16' operating room constructed. The disposition 
of equipment for the period was as follows: two TD-18 angledozers 
at the Division Hospital; one TD-18 angledozer ani motor patrol 
grader on tbe Division supply read; one TD-18 utility tractor and 
pull grader and TD-18 angledozer on the road running from CR 249 in 
TA 183G- to the ouarry and from the quarry to Blue Beach Two; motor 
patrol grader also worked on the road from the Division Hospital to 
the quarry, completing the grading of this road for two way traffic; 
one TD-18 angledozer, one 3/8 yard shovel and a truck loader tractor 
at the quarry; eight trucks continued to haul clay. Water supply 
operations for the period were as follows: Units operating - 17; 
water delivered - 10,060 gals; water stored - 8,500 gals; water dis- 
tilled - 15,160 gals. Mine detail found several mines along the road 
shoulders between the quarry and CR 249 in TA 183G-. 

Company U A H carried out normal demolition missions and removed a 
road block in TA 184W,X. 

Company H B n continued work with its armored bulldozer on roadways 
and craters .in the vicinity of Airfield No* 2. 

5*** t j**'*y V'.' 





4 



Fourth Engineer Battalion - Operation Report - IWO JIMA (cont r d) 



. .; ; -Company "C tt was inactive during the period except for the armored 
bulldozer which improved the roadnet in the vicinity of the RCT~23 
command post . 



Surfacing of the -Division supply road was completed. Grading of 
the road between the quarry and CR 249 in TA 183G was completed* 
Improvement of the road from CR 249 in TA 183G-, running through 183F 
and TA 182J,0,N to CR 263 and then through 182R,X,W to Airfield No. 
1 was started. A new, .road was surveyed and graded in TA 165E,J 
and TA 183V. Loading operations in the quarry were taken over. by 
62d Naval Construction Battalion. Equipment of the battalion was 
employed as follows: One TD-18 angledozer on the Division supply 
road; one TD-18 angledozer at the quarry; two TD-18 angledozer s on 
the road from Airfield No. 1 to CR 249 in TA, 1830} one TD-18 angle- 
dozer on the new road project; motor patrol grader on the road between 
the quarry and CR 249; one TD-18 utility tractor and pull grader on 
the road from Airfield No. 1 to CR 249; ten trucks hauled clay. The 
Hq&3erv Company mine detail discovered and removed a large mine field 
at CR 249. The first platoon of Company tt B tt and the second platoon 
of Company W C" were made available by RCT-24 and RCT-23, respectively, 
to assist the battalion mine detail. WatSr supply operations for the* 
period were as follows: Units operating - 17; water delivered - 
18,155 gals; water stored - 7,645 gals; water distilled - 17,300 gals. 
A flagpole was constructed and delivered to the Division Cemetery* 

Company "A! r engaged in mopping-up demolition work and the removal 
of mines in TA 184X. • 

Company u B tt assisted H^&Serv Company detail in removing mines at - 
CR 249. Second and third platoons executed demolition missions in 
TA 201V and TA 201P,Q, respectively. 

Company w C tt was with RCT-23 in reserve. The second platoon 
helped Engineer Battalion Headquarters in probing a roadway for 
mines. The bulldozer was 'operated on a road in TA 183C,D. 



3-4 March 



4 - 5 Karch 




The road from CR 249 in TA 183G to Airfield 



- 13 - 




allon - Operation Report - IWO JIMA - (cont'd) 



The road from TA 183V through TA 165E,<X was graded and surfaced with 
clay. The road from the lateral beach road to Water Point No. 4 was 
graded and surfaced with clay. The road between TA 165R and N was 
surfaced with clay. Disposition of the equipment for the period was 
as follows: One TD-18 angledozer and TD-18" utility tractor with 
pull grader on the road from CR 249 to Airfield No. 2; one TD-18 
angledozer at Water Point No. 4; one TD-18 angledozer and motor pa- 
trol grader on the road in TA 183U, TA 1652, J; one T&-18 angledozer 
on the Division supply road extension; ten trucks hauled clay. Water 
supply operations for the period were as follows: Units in operation- 
15; units unde> repair - 2; water delivered - 18,130 gals; water 
stored - 5200 gals; water distilled ~ 15,685 gals. 

.Company "A n continued its mopping-up operations in the RCT-25 
zone of action. 

Company "B" worked on the roads in TA 200V and ,TAr.l83D,G, The 
roadway from CR 249 to Airfield No. 2 was searched for mines. Dem- 
olition missions in TA 201V,P,Q were continued., • • 

Company n C" was inactive during "the period." ■ - 



5- 6- March 

Road construction for this date consisted of maintenance of the \ 
existing road net. Surfacing of the Division Cemetery was begun 
using clay from a new quarry opened this date at TA 1*83W,X. The old 
quarry was turned over to the 62d Naval Construction Battalion. The 
flagpole was erected at the cemetery. The Hq&Serv Company's engin- 
eer equipment was employed as follows: One TD-18 angledo.zer and one 
truck loader tractor at the quarry; TD-18 utility tractor with pull 
grader and one TD-18 angledozer on road maintenance; one motor patrol 
grader and two TDr-18 angledozers at the Division cemetery.. project ; 
ten trucks hauled surfacing material. Water supply operations for 
the period were as' follows: Units' operating - 16; units under re- ' 
pair - 1; water delivered -* 20,670 gals; water stored - 3500* gals; 
water distilled - 18.,9W gals. An angledozer operating in. the' 
cemetery struck a deeply buried mine, wrecking the traotor ; and 
slightly injuring the Operator. Mine detail cleared, the ' new. quarry 
area of mines and duds. ' ' 

Company "A 1 * graded- the old roadway running through TA V 183W,R,M 
and continued demolition and mine removal operations in TA' :i 184. 





Company tt B n, s second platoon continued assault # work In TA 201P,Q. 
The other elements of the company were, inactive. 



Company W C" returned to the front lines to execute mine and de- 
molition missions in TA 201J, L',.N,W. The armored bulldozer improved 
and graded the road in TA 18"3G,B. 



6 - 7 March 



Maintenance of the road net and surfacing of Division Cemetery 
was continued on this da^e. Two TD-18 angledozers and one TD-14 
utility tractor with pull grader operated on road maintenance. One 
TD-18 angledozer i mo roved the road from RJ 69 through TA 166C,D,E 
to the East Boat Basin in TA 167A. The motor patrol -grader worked 
on the Division supply road during the morning. One TD-18 angle- 
dozer continued to spread clay at the Division Cemetery project. / 
One truck loader tractor and one TD-18 sngledozer continued opera- 
tions in the quarry. All available trucks hauled surfacing mater- 
ial. The mine detail probed an area around the Division Cemetery 
for mines and worked on the road to the East Boat Basin; some mines 
were found at the latter location. Water supply operations for the 
period were as follows: Units operating - 14; units under repair - 
3; water delivered - 17,960 gals; water stored - 4400 gals; water 
distilled - 18,860 gals. 

Company "A" worked on the roadway in TA 184 and continued mine 
removal and demolition work. 

Company "B" did not change its disposition from that of the 
previous day. 

Company "C H performed heavy demolition missions in TA 201E,I,H, 
N,V. The armored bulldozer graded roadway in TA 182V, T and T£ 183P. 

7 - 8 : March 

A forward area supply road from TA 183C through TA 200W,X,S was 
graded by the TD-18 utility tractor with pull grader. The battalion 
mine detail probed this road site for mines. One TD-18 angledozer 
and the motor patrol grader spread clay and graded the road section 
between the Division Hospital road and the Division supply road. 
This road masses through T A 165-1, N. Work on tj|%Jf ^ 

|- V- : v .-W - 15 - 





.-..'S«*|-!| ii^.. 

Fourth Engineer Battalion - Operation Report - IWO'JIMA - (*cotitr*dV ' 

in TA 166B to East Boat Basin continued with one TD-18 angledozer 
operating, on this job* The truck loader and a TD-18 angledozer 
continued operation in the quarry. One TD-18 angledozer continued 
the surfacing job in the Division Cemetery. The mine detail removed 
four box mines from enemy emplacements in TA 183U. Water supply 
operations for the period were as follows; Two additional unit's 
installed at Water Point No. 4 and one additional unit at Water Point 
No. 3. Units operating - 15; units under repair - 2; water delivered- 
15,675 gals; water stored - 5,700 gals; water produced - 16/975 g&ls. 

Company tt A H continued work of the previous day* 

Company "B ,K worked on the road in TA 200S. The platoons remained 
with their respective BLT r 6. , 

Company ^C u wiuh all its platoons attached to SLT £-23 removed 
mines arid performer!-- demolition missions in TA 201E,J,N. The armored 
bulldozer graded a" road. passing through TA 183C-D* and TA 200X,T,0, 

8 -9 March 

, The TD-18 utility tractor with pull grader worked on roads running 
from, the East Boat Basin &t TA 167A to RJ 69 in TA 166B through CR 
249 in TA 183G to Airfield No. 2, and from CR 249 to CR 263 in TA 
182M. Clay surfacing was spread, on roads in vicinity of CR 249 with 
twcr TD-18 angledozers voting in' this area. One TD-18 angledozer and 
the truck loader tractor operated in the tjuarry. One TD-*18 angledozer 
and motor patrol grader maintained the road from the. quarry to the 
Division Hospital. One TD-18 angledozer continued. 1/fork irt Division 
Cemetery. One TD-18 angledozer .dug two additional revetments for the 
Division Hospital and three revetments for the. Provisional Battalion 
at TA 182V, Eight trucks .hauled clay . Water supply 1 operations 
for the period were as follows; Units operating^-. 16; units under 
repair - 4; water delivered - 18,970 gallons; water' stored - 4,800 
gals j water distilled - 18,070 gals. Two officers .and fifty men 
were detached from Kq&Serv Company for temporary duty with provi- 
sional Battalion, acting as a Division Reserve Battalion and for 
mopping up in rear areas. 

Company tt A H 's situation was unchanged from the previous day. 

Company }W started assault work along the beach road in the vi- 
oJih|.t3|icr r f f & 166BV The armored bulldozer operated on roads in 

111*** * ■ 



- 16 - 



urn ftppinrn 

UlfyiLrilllJII IILII 




pLion - Operation Report - I WO JIMA - (cont'd) 



TA 201P,V,W,S and 200T,0,X, 

Company M C H continued mopping up work of the previous day* The 
armored bulldozer graded the road in TA 201G,H,M,N,0. 



The TD-.18 utility tractor with pull grader maintained the inland 
road net.. Ho tor patrol grader engaged in maintenance of the roads 
in the Division beach area. Quarry operations continued, using the 
truck loader and one TD-18 angledozer. One TD-18 angledozer dug an 
additional revetment for the Provisional Battalion at TA 182V. 
Additional access roads were constructed to Beach Blue Two, clay 
being spread on these roads and on the beach. Surfacing of the 
Division Cemetery continued with one TD-18 angledozer working there. 
Water sprinkler operated throughout the day on the Division rear area 
roads. Water supply operations for the period were as follows; 
Units operating - 18; units under repair - 2; water delivered - 
19,490 gals; water stored - 6,575 gals; water distilled - 21,265 gals. 
Two additional units were installed at each of Water Points No. 1 and 
2. 

Company !, A tt continued work of the previous day. 

Company "B" removed U.S. anti-personnel minefield in TA 184T,Y, 
and continued mopping-up operations in TA 201W,S,T; TA 202P,U; and 
TA 184C,D. The armored bulldozer improved the road running through 
201V,W,X,S,T and TA 202U. 

Company tt C M continued to perform demolition missions in TA 202L, 
Q,,V,N, The armored bulldozer continued its work of the previous 
day and extended the road through TA 201 and TA 202P,Q,,V,W. 



The motor patrol grader maintained the roads in the Division 
rear area. The water sprinkler worked on the road from the Division 
Hospital to the Division dump. Twelve trucks hauled clay from the 
quarry where one truck loader and one TD-18 angledozer were oper- 
ating. Surfacing of the beach access roads and of Beach Blue Two was 
continued; one TD-18 angledozer and one TD-18 utility tractor with 
pull grader spread surfacing material and graded this area. Ihe road on 



9 - 



10 Harch 



10 - 11 March 



- 17 - 




Operation Report i'NIft^fMA^^f ton4 f 2t 



the east-west runway of Airfield No. 2 through TA 183A,B,C; TA 200X 
wa : s graded. An access road running through TA 165V, TA 149B,C to 
Water Point No. 1 was constructed and surfaced. Three TD-18 angle- 
dozers continued grading and excavating in the Division Cemetery, 
Water supply operations for the period were as follows: Units oper- 
ating - 20; units under repair - 4; water delivered - 23,170 gals; 
water stored - 3600 gale; water distilled - 20,195 gals. 

Company "A" improved the roads in TA 185P , TA 184C,D,I and TA 
201V. Demolition missions 'were continued in TA 185. 

Company "B" Improved the road from Higashi Village to RJ 116 and 
thence right and left to 185L,H. The first platoon was attached to 
Company "I", 25th Marines for demolition work. The remainder of the 
company did rear area demolition work around Higashi Village. 

Company "C" with all its platoons attached to BLT 1-23 contin- 
ued mopping-up operations in TA 202W,X,S,N. Mines Were removed from 
the beach in TA 203U. The armored bulldozer graded the road running 
through T A 202Q,V,W,X and TA 185F. 



11 - 12 March 

The water sprinkler worked on the road from the Division Hospit- 
al, to the Division dump running from TA 16 5L to RJ 184 through TA 
165-1, N,R,Q,V,U; TA 149A and 1482, The. motor patrol grader was en- 
gaged in maintenance of the Division inland road net as far as Air- 
field No, 2. One TD-18 utility tractor with mill grader graded the 
Division reembarkation area and access roads at Beach Blue Two and 
also the road from CR 249 to 'CR 263 to Airfield No. 1. Quarry 
operation continued with one truck loader and two TD-18 angledozers. 
One TD-14 angledozer worked alternately at the quarry and at the 
Division Cemetery. Eleven trucks hauled clay to the surfacing pro- 
jects. Water supply operations, for the period were as follows; 
Units operating - 21; units under repair - 3; water delivered - 
23,260 gals; water stored - 6250 gals; water distilled - 25,910 
gals. Tw6 officers and fifty men rejoined the Battalion from the 
Provisional Battalion "upon "its disbandment . 

Company "A* continued its operations of the previous day. 





UIIUASHC 

Fourth Engineer Battalion - Operation Report,- IWO JIMA - (cont*d) 



Company H B" executed demolition missions in TA 202 and TA 185. 

Company "C" with all of its platoons attached to BLT 1-23 con- 
tinued to close the entrances of caves in TA 202K,L,P,Q, S,T,W,X, Y 
and TA 185D,E. 

12 - 15 March 



The motor patrol grader continued maintenance of the Division 
rear area road net. The water sprinkler continued working on the 
road from the Division Hospital to the quarry and to the Division 
supply road. One TD-18 angledozer and the TD-18 utility tractor 
with pull grader worked on the road from TA 165V to Wat:er Point No.l, 
One TD-18 angledozer spread surfacing on the road from TA 165-1, M, 
L,Q. One truck loader, two TD-18 angledozers, and one TD-18 utility 
tractor and ripper operated in the quarry. Two TD-18 angledozers 
continued operation in the Division Cemetery. The Hq&Serv Company 
mine detail assisted Company "C w in RCT-23 zone of action removing 
mines in TA 202P,U. Hq&Serv Company also supplied a 12 man working 
party to the Division for a Jap burial detail- Water supply opera- 
tions for the period were as follows: Units operating - 24; units 
under repair - 3; water delivered - 25,805gals; water stored - 
10,200 gals; water distilled - 29,755 gals. 

*** 

Company ^A" was engaged in mopping-up operations in TA 185. 

Company M B" removed mines from small fields in TA 185R,S and 
marked the remainder of a U.S. anti-personnel minefield in TA 184, 

Company "C" had all its platoons removing a minefield in TA 
202P,Q,U. At 1500 all platoons reverted to company control and 
moved to bivouac area in TA 182Y. 



13 -* 14 March 



Reembarkation operations started this date. All engineer work 
with the exception of water supply ceased. . A loading detail of 5 
NCO's and 50 men were supplied to load the USS KINGSBURY. One 
officer (loading officer! and 17 men (equipment operators) reembark- 
ed aboard the USS KINGSBURY for transportation to base camp. Bat- 



talion equipment was prepared for loading.- Jjfeter supply operations 



for the period were as follows*. Units op 



- 19 - 



11 





water delivered - 23,360 gals; water stored - 9,925 gals; water 
distilled - 23,085 gals. 

Company "A M continued to execute demolition missions in TA 185. 

Company "B" was engaged in mopplng*-up operations in TA 185. 

Company n C n remained in bivouac area. 



Preparations for ^embarkation continued this date. Shower 
facilities were r -cr^t quoted at Water Point No. 4 for Fourth 
Division troops^ 'vaster- supply operations for the period were 
as follows i Units operating - 22; units under repair - 5; water 
delivered -23,690 gals; water stored - 9,000 gals; water distilled - 
22,765 gals. 

Company "A" continued operations of the previous day. 
Company "B" continued operations of the previous day, 
Company "C" remained in rest area. 



Five trucks resumed hauling clay to the Division Cemetery. The 
quarry was now operated by the Third Engineer Battalion. Water 
supply operations for the period were as follows? Units operating - 
22; units under repair ~. 5; water delivered - 24,720 gals; water 
stored - 8,765 gals; water distilled - 22,485 gals. 

Companies "A" and H B". continued their operations in TA 185. The 
last elements of organized enemy resistance in the Division area 
were over come. by nightfall* 

Company "C tt - was- embarked aboard APA 177. 



Preparations for reembarkation continued. Operation of the water 



14-15 March 



15-16 March 



16-17 March 





UNCLASSIF 

Fourth Engineer Battalion - Operation Report - IWO JIMA - (cont'd) 



units terminated on this date. Water stored was delivered to the 
Division dump. Total delivered for this date was £5,750 gals. 

Company ,l A w was embarked aboard APA 172. 

Platoons of Company *B n occupied a defensive position in TA 184 
during the entire period. 



17 - 18 March 

Preparations for re embarkation completed. The Battalion Command 
Post closed at 1600, 18 March and unit moved to Beach Blue Two for 
re embarkation. 

Platoons of Company 11 B M reverted to company control at 0700. 

: ;v |8fr- 19 March 

Officers and enlisted men of Hq&Serv Company and Battalion Head- 
quarters reembarked from Beach Blue Two at 2200 and boarded the 
U.S.S. PICKAWAY, APA 222, at 2400. 

Company "B tt was embarked aboard APA 222 at 1800- 





APPENDIX 1 
OVERLAYS OF PROGRESS 




t * 




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pao&e/? pop as/hes. 

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GA/<SM. J&H. /- /O" POCKET 0U0 A£A<fO\/£0 



"C " CO, £TAy<5/Z. 3/V. + 4 



AP AS/NE3 PEA4OVE0 
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REFERENCE MAP: r.2O06<? SPECIAL A»R f 
GUNMC^TAROET MAP OF UVQ J IMA 



4^EN6INEEP« BN. 



SITUATION 

MQ I 



MAP 



FROM D-DAY TO 1400,D*7 




s » 



Nlof e: 



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/*A£H3£r& A"ASE^. C>+/6 



LEGEND 



PO/AJjr /a/JTAL L SO 
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AEFBRCMCC MAP. I.'20p00 &PCCIAL Al« « 

CiUMNC^r TARQfiT MAP OF I WO JIM A 




4= ENGINEER BN. 

SITUATION MAP 

NO. 2 

1600,0+7 TO I6OO.0+I6 




/ ALL ROAD 5JTES &OTH PROPOSED 

AA/O UhfOEt* COA/S TRUC TtON At A VE ft BEN 

rrooeo fop. mimes. 

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/A/ 0/\y/J/O^J REAR. jO>RGA. O + T «2<Z 



TAS ZOZ Pa MINEO. IZ YARDSTICK 
3 TEA&A COTTA MINES J Z 
AERIAL &OME>S REMOVE O. D+ZZ 
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TAS I03C, ZOOIi/XS <2>RAOEO. O* /T, ZO 
4TS CN&P. -O/V. 



PULL KbRAOER / /TQ-tS GRAOED 
ROAO ON D + IQJ9. 

Roao 3U*faceo with clay, o-f/e 



4 REVETMENTS CONSTRUCTED FOR 
+rts PROVISIONAL 0+/8. 



ROAD BWiPfNED 
P+ZO.W n C"CO. 



/eEZ&A/G£-& /9 
~& " Co., <? & £Wtr ^s^v 



ROAO IN TAS IGSIN SURFACED 
IVITH CLAY, O+H 



MOTOR &RAOER MAINTAINING 
ROAO FROM RJQ>9 TO RJ /34A. O + IS. 
ROAO SURFACED IVITH CLAY. O + /&. 
ROAO SPRINKLEO OA/ D+IG. 



Z AOOITIONAL REVETMENTS 
FOR OIV NOSP/TAL. D+/&. 




MOT OA PATROL GPAOEO ROAO OA/ D + /T- 



ADDITIONAL GRADING ON CEMETERY. 0+IS,ZO, 
Zl. ZZ,Z*>. 

CEMETERY SURRA CEO II/ITR CLAY O* IT, IS, 19, 



CLAY FILL MAUL EO TO ROAO /A/ /GSV. 
149 JS>c to i¥ R no.i . 0+zo.zi zi. 




TA3IE5S, 1/ SlN&LE NORA/ 
e 3 TAPE M E A SURE MINES 
REMOVED. O + ZO. %% t>"CO 
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//V TAS /66 GCOE, /67 A. D+I7-I9. 

-4-0 SHOWS*.*,, /SEA/CHE S, OUCK/bOAADS, f CJLOTHIN& 
RACKS &UILT AT IV.R **4. D + Z4,ZS 



WATGf* ROtAJT A/O. 4. 
UNITS /NSTALLEO. 

WATER POINT NO. 3. 
<b UNITS INSTALLED. 



WATER POINT A/o./. 

T UNITS INS TALLBD. 



WATER POIAtT NO. Z. 
G UNITS INSTALLED. 



u e ee N D 

Af/WEO AREA 

WATER PO//VT //V STALL EO 
OA/ /3ETACH 

/?oa os twoex 

<?OA/*5 TRTUC T/O A/ OR RE PA IR . 



ft EFERENC E \AAP '. I '. £0000 SPECIAL 41R £ 
GUNNERY TARGET MAP OF |\VO J IMA 




4 a EN6INEER BN. 

SITUATION MAP 

NO. 3 
l6O0.D*l£ TO 



fsl OTE.3: 



4 /*£*<?WS/0/VAJL &AS. 



....ir.fVVV' 1 -> 






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C O 7*^ L/C 7VO/V cm, #£04/ & 


REPERENCE MAP: 1 : 20,000 SPECIAL A>R € 
GUISJlOEPvV TARGET MAP OF hVO JIMA 



^ENGINEER* BN. 

COMPOSITE 
SITUATION MAP 

FROM D-DAV TO I600.D+25 



UNCLASSIFIED 



APPENDIX 2 
MINE R&OVAL 




Fourth Engineer Battalion - Operation Report - IWO JIHA - (cont f d) 



An increasing tendency of the Japanese to engage in mine warfare 
has been observed in reports of recent operations throughout the 
Pacific Ocean Areas. This trend was apparent in the Iwo Jima opera- 
tion, where the Japanese, displayed logical, tactical employment of 
mines. Although their efforts were, fairly effective, the state of 
training of the enemy forces had not reached the stage where maximum 
efficiency was attained. In many instances mines were discovered 
emplaced but not activated; the frequency with which this occurred 
is attributed to Incomplete training and casualties to key personnel* 

Although no radically new types of mines were encountered, new 
methods of activation were observed. Two new type grenades made 
their appearance, and a shaped-charge anti-tank grenade was found in 
quantity. The following mines and grenad-es were found: 

(1) Two-horn Hemispherical Mine. JLXIII. 

Comment: Unfavorable beach and surf conditions apparently 
precluded the use of this mine as an anti-boat 
mine> but small fields were discovered about 100 
yards inland for anti-tank use. On several occa- 
sions these mines were used for road blocks. See 
photograph No* 1. 

(2) One-horn Conical Mine, JLXVI. 

Comment: This mine designed for anti-tank and anti-mechani- 
aed defense was encountered throughout the Divi- 
sion Zone of Action. The majority however, were 
found on the beaches and their immediate vicinity* 
On the Yellow Beaches this mine was found burled 
in an inverted position without the chemical horn; 
it was activated by placing a yardstick mine 
aero 6S the base* On small beaches in the north- 
east sector of the island this type of mine was 
found partially burled inland from a low barbed 
wire entanglement. As many as five trip wires were 
connected between the mine's single horn and the 
barbed wire* Se photograph No. 2. 

(3) Aerial Bombs 50. 63 and 250 Kg - Buried as Kines. 



Comment: All bombs discovered were of the Navy type. Con- 
trary to previous enemy doctrine which called for 




Iff! 

'oiirth Engineer Battalion 




Operation Report - IWO J I MA - (cont'd) 



bombs to be buried in a vertical position and armed 
with an A-3 type fuze, these bombs were buried 
horizontally without fuzes. Bombs were activated 
by placing a yardstick mine on top and in direct 
contact with the bomb. This procedure generally 
proved to be very effective. See drawing No. 1. 

(4) Yardstick Mine. 

Comment: This mine was widely used as a means of detonating 
heavier charges as previously mentioned, but it 
also appeared by itself in anti-tank and anti- 
mechanized mine belts and defenses. See photo- 
graph No . 3* 

(5) Terracotta Mine. 

Comment: According' to Japanese instruction sheets this mine 
is to be used against vehicles and personnel. On 
Iwo Jima it was primarily employed as an anti- 
personnel weapon. It was found near emplacements 
and close to barbed wire entanglements either with 
or without a trip wire (cat-gut is used for trip 
wire, 30 yards being supplied with every 5 mines). 
See photograph No. 4. 

(5a) Box Mine (Small). 

Comment: This mine is an adaptation of the terracotta mine 
using the same fuze and explosive charge. See 
photograph No. 5. 

(6) Tape Measure Mine. 

Comment: Extensive use of this mine in the vicinity of 
emplacements and roads was noted. Both anti- 
personnel and anti-vehicular fuzes were used. The 
mines were scattered indiscriminately without 
regard to pattern. See photograph No. 6. 

(7) Magnetic Anti-tank Grenade (Mine). " """" 





Comment: One or more of these was found on The perso 

enemy dead in the initial phases of the operation 
4ptis ..^nmgp It seems probable that this item is standard 



- 23 - 




o1!rt£ Engineer Battalion - Operation Report - IWO JIMA - (cont'd) 



equipment for each soldier, tin«itd<£ition to its 
primary use it is exceptionally effective as a 
hand grenade » See photograph No, 7* 

(8) Anti-Tank Grenade (Shaped-charge) . 

Comment: These grenades appeared for the first time in 
quantity. Two sizes were found which indicate 
that it is still in' the experimental stage. Al- 
though each emplacement for infantry appeared to 
, have a large quantity on hand, no instances of 
their use upon our tanks were reported in this 
Division's sector. Experiments conducted showed 
this grenade to be capable of penetrating our 
medium tank's armor. The teBt was made with a 
hand placed charge. See photograph No. 8. 

(9) Terracotta Hand Grenade. 

Comment; Reports indica.te that this grenade is used fos 
concussion effect, but It does not appear to be 
too effective. See photograph No. 9. 

(10) Frangible Smoke Grenade. White. 

Comment: This grenade contains a yellowish liquid, which, 
according to translations from the instructions 
on the shipping container, is of varying composi- 
tion. The liquid composition is primarily titanium 
tetrachloride with varying amounts of silicon 
tetrachloride. See photograph No. 10* 

(11) Improvised Box, Mine. 

Comment: Numerous mines were found in and around emplace- 
ments, but very few had been activated or emplaoed. 
See photograph No. 11. 

Molotov Cocktails. 

Comment: These were widely distributed but unused. In many 
instances whole* cases were found unopened* One 
type is shown in' the accompanying photographs. 



- 24 - 




Fourth Engineer Battalion ~ Operation Report -''IWO JIHA - (cont'd) 

The liquid filling has a petroleum base with some; 
thickener added, possible latex. See photograph 
No, 12. 

(13) Miscellaneous Gr ena des and Prepared Explosive Charges* 

Comment: See phonograph No. 13. 

Japanese policy, based on information gathered to date, does not 
appear to dictate a standard mine pattern. Definite trends and ten- 
dencies observed indicate that some doctrine is being formulated. 

Beach mine defenses have taken on the most definite pattern and 
can be broken down into three zones or mine belts: 

a. Anti-boat defense zone: This mine belt i6 composed of 
two horn hemispherical mines usually placed off shore 
from the high water mark* Due to unfavorable surf con- 
ditions this was n6t borne out in this operation, but 
the doctrine has been well established in previous 
landings. 

b. Beach defense zone: Again as in previous operations the 
single horn conical mine was found on and in the immediat- 
vicinity of the beaches. Two rows of these mines were 
found, rows about six paces apart with individual mines 
in the rows six paces apart and staggered to give a mine 
density of one mine for every .three paces of front-. 
Barbed wire may or may not be found to seaward of tht s. 
belt. A typical section of this type is shown in Graving 
No* 2, attached. 

♦ 

c. Inland defense zone: This zone inland from the beaches 
was compo.sed of 850 Kg aerial bombs activated with yard- 
stick mines. Drawing No. 3 shows the pattern found about 
150 yarde inland from Blue Beaches, rows 1 and 2 con- 
tinued on down through the Yellow Beaches. The Japanese 
had conveniently marked the location of each bomb with a, 
small wooden stake that had never been removed. 

After beach areas are passed mined areas can only be anticipated 
but not definitely predicted, and thereaf t^r^ha^mlnj 
indefinite. Areas in the vicinity of barblf MlM^W^f^EFIfPi^ d 

in Drawing No. 4) are likely to be mined w] 

*' • # 

- 25 - 




Operation Report fyffitf "Ccont ' d) 

anti-personnel mines. Drawing No. 5 is a typical example of this 
type of field. Anti-personnel mines are to be expected in front of 
emplacements, but no pattern can be anticipated. Road shoulders were 
found to be mined in many instances but there seemed to be little or 
no regularity or pattern. A considerable number of nuisance mines 
were scattered over the entire island. 

Although numerous booby traps were reported, no report of a 
booby trap actually being deactivated was received. 

The mine removal procedure developed and practiced during the 
training period prior to the operation was employed by the Engineers 
during the operation. The S.O.Pt on minefield and mine marking, as 
it applied to assault phases, was followed throughout the operation 
and proved to be of great value to all units engaged in this work. 

Although each Engineer platoon had a magnetic mine detector 
(SCR-625) at its disposal, the high iron content of the soil on 
Iwo Jima made its use impractical. All buried mines discovered 
were the result of systematic probing with utility knives, bayonets 
or similar articles. Several non-metallic mine detectors (AN/PRS-i) 
were received just prior to embarkation, but insufficient time was 
available to properly train operators* Preliminary results obtained 
with the two units carried by Headquarters and Service Company wer-6 
disappointing. Further tests will be conducted in rehabilitation 
area to determine usefulness of this detector. 

The assistance and cooperation of the Second Bomb Disposal Com- 
pany in the removal and disposal of mines and bombs contributed 
greatly to the success of the entire mine removal project. 



U 




Fourth Engineer 



- - - 

at^alion - 




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250 KG. bOMb 



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LEGEND 

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^ \A//r/-t ws^/e^ /a/ /sac/-/ /?ow /er&^ A/>A/?r 



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/: 20,000 ^/?£C/A/. A//^ * 'qt/A/AS£*Y MA/*' /WO S/MA. 

D/e^w/AJG A/a' 




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TYPICAL JAPANESE WIRE 5ECTION 



FOUND ON IWO JIMA 



S//VGLE STPAA/O MPE>EO W/PE 57XPCE0 TO SMALL WOODEN 
POSTS 6"TO /2" A60VE T//E GPOOW&. T/SE POSTS AGE PLACED //V 
A TP /A A/ GO/- A P PATTEPAC EACAJ POS7~ A&Ot/T <S' APART 





TAS 202P 



YARDSTICK M/A/E 
OA/ TOP OF A SO MG> 
AERIAL /OOME>, 




N 




5//VO/. £ -ST A A A/0 COW /SARfbED 
W/RE~ TR/AA/ OC/JL A A PA7 TEA A/. 



terracotta mines were place £> 
without reg aro for pat tea a/, e>ut 
<»ea/erally hear. to the edges of the 

IdAREjED WIRE. 
Z. YARDSTICK MINE R.OWS WERE A&OUT 4 PACES 
APART. M/A/E DENSITY: / RCR /S* YARDS 
OF FRO A/T 
3. NUMEROUS TERRACOTTA &RJSA/ADES 
WERE FOUASO SCATTERED T//ROCSG, /V 
THE AREA. 



QUANTITY 

& 
IZ 
l 

ei 



TOTAL- 



TYPE 

$ TaRRACOTTA AS/A/ES 
— YARD5 T/C/< /W//VE3 
^ER/AL. /2>0*f& 



D&AW/A/G A/QSL 



-3CAJLE: /V0A//Z . J?EFE/?EA/cE ATAR / ?O0a*s/>EC/A/L 




APPENDIX 5 
WATER SUPPLY 




fttalion - Operation Report - IWO JIMA - (cont'd) 



1. The following report of water production and operational 
difficulties experienced with various Badger Distillation Units 
together with general notes and observations of the water supply 
problem is herewith submitted. Only breakdowns or other malfunc- 
tions that caused one or more hours inoperation are recorded herein. 
Other shutdowns, caused by minor mechanical difficulties and quickly 
corrected in the field are deemed unimportant and therefore, not 
mentioned. 

2. Mine distillation units were unloaded from an LSM on the. 
beach at approximately 1600, D/5. Six of these units were set up in 
revetments during the course of D/6 and late in the same afternoon, 
water was being produced from four units. By noon of D/7, 3500 gal- 
lons had been produced of which approximately - 500 gallons had bean 
dispensed. As additional units were unloaded, they were set up and 
put into operation. During the period, D/7 through D/9, no accurate 
record of operation was attempted; however, it is estimated that a 
total of 30,000 to 35,000 gallons of water was produced and dispens- 
ed to all comers at the water points. On D/10 a delivery system was 
established whereby all water was hauled to the Division water dump 
for further distribution. An accounting system of water thus deli- 
vered was also set up at this time. Records were kept on* a 24 hour 
basis, a consolidation of which is tabulated as follows: (See also 
graphical analysis of water production attached). 



DATE 


' WATER ON HAND 


WATER ISSUED 


D/lO 


900 gal. 


15,290 gal. 


11 


3400 


14,220 


12 


8500 


10,060 


13 


7645 


18,155 


14 


5200 


18,130 


15 


3500 


20,670 


16 


4400 


17,960 


17 


5700 


15,675 


18 


4800 


18,970 


19 


6575 


19,490 


20 


3600 


23,170 


21 


6250 


23 > 260 


22 


10,200 


25,805 


23 


9925 


23,360 


24 


9000 


23,690 


25 


8765 


24,720 


26 




25,750 



TOTAL 338,375 gals 
- 27 - 



NGfcASHD 




• ■ ** , i 



Battalion - Operation Report - IWO JIMA - (cont'd) 



SUMMARY 

Theoretical total capacity (1500. g.p.d. /unit on beach) - 502,500 gal. 
Recorded amount of water issued - period D/10 to D/26 - 538,375 ' rt 
Losses due to units being out of service - - 69,000 gal. 
Other losses (errors in accounting, leakage, 
seepage, spillage, pilferage, contaminated 

distillate, etc. - -- -- -- -- -- -- 95,125 

Total Operation Losses 164,125 gal. 

Average number of units in daily operation - - - - : - 18.5 

Average quantity of water issued daily - -- -- -- --- 19,904 gal. 

.Average production per unit in daily operation ----- 1,075 " 

Average efficiency per unit, daily ----------- 72% 



3. (a) UNIT MC #6 0380; This unit -was started 25 February and 
operated approximately J hour when the Morflex Coupling 
(installed at rest camp) failed. The Fottstown Compress- 
or on this unit was quite noisy arid the engine seemed. ~u 
be laboring. A Crocker- ,! . , heeler rubber ball coupling ju.. 
substituted but the balls failed after approximate!'/ 
hour. New balls were installed after which the unit vd? 
again started. Quieter operation was noted and no fur- 
ther trouble was experienced until 11 March when the floe I 
valve in engine water cooler failed to function. At thia 
time it was noted that engine rpnrs were lessening. Val 
and carbon job on engine necessary. Float was found to 
have come loose due to vibration. Unit put into opera- 
tion after about 9 hours. Shu-t down again on 16 March 
due to need of cleaning tubes which job was not accomp- 
lished as the water point was s-ecured. 

(b) UNIT MC #50254: This unit was started 25 February and 
operated approximately 12 hours when the Morflex Coupling 
(factory installed) failed. This unit was equipped with 

a Sutorbuilt compressor and rah very' quietly and smoothly. 
Rubber ball coupling installed after which no further 
trouble was experienced. Time j out of service approxi- 
mately 3 hours. - 

(c) UNIT MC #50253: This unit started 25 February and opera- 
ted approximately 15 hours when the Morflex Coupling fail- 
ed. Another Morflex Coupling from a unit not in operation 

; > - • - 28 - 





was substituted after which no further trouble was. ex- 
perienced. Time out of service approximately 5 hours . 
On 16 March this unit was shut down to clean tubes which 
job was accomplished in about 10 hours. Unit ready for 
further operation but water point was secured at this time 

(3-) UNIT KG #80727: This unit ran perfectly for 5 days. Dur- 
ing a routine shutdown for lubrication the engine seized 
for no apparent reason. Engine completely overhauled 
and unit put back into service after about 8 hours. On 
15 March "this unit was shut down to clean tubes and en- 
gine which job was accomplished in about 10 hours. Unit 
ready for further operation but water point secured at 
this time. 

(e ) UNJT_ JiC._i^C'05o5 This unit was noticeably noisy a short 
time arc or b->. ng started up on 7 March. On 11 March, 
K'T'Sgt jPoilook investigated source of noise and fou.ul 
broken half- tootn on drive gear of Sutorbuilt come re n so r- 
with mating half-tooth on driven gear cracked. Secur-~cL 
the uni g as unserviceable. This is a new machine anc 

had never been tampered, with or adjusted by this bat-s-al i ;n 

(f) UNIT MG #59945' This unit is one of the six given up i -i 
place of six units surveyed at rest camp. All indica';;: . on j 
are that it is a ''rebuilt" job. Is equipped with Pott^- 
town compressor. Was put into operation on evening of 

11 March. Ghest pressure failed to reach normal level 
and erratic operation was experienced. Distillate was 
produced but constant attention of operator was necesnary. 
"Trouble shooting" was started next morning and contin- 
ued until 15 March when a defective gasket on the inlet 
end of the heat exchanger was found. According to the 
operation manual, this end of the heat exchanger need 
not be tampered with unless a complete overhaul is de- 
sired. Defective gasket replaced and unit put into 
operation with excellent results. 

(g) UNIT MC #80728: This unit out of service about 24 hours 
to install new shaft and bearing on brine pump and to 
clean engine. Pulley on shaft worked" loose and wore 
down shaft so that further tightening of set screw was 
ineffective. Engine water pump had developed a leak 
and was replaced at this time. 




T 

Fourth Snglneer Battalion - Operation Report - IWO JIMA - (cont'd) 



(n) UNIT ,MC #59982: This unit out of service about 24 hours 
to clean engine and to replace leaking engine water pump. 

(i) UNIT MC #80518: This unit out of service about 24 hours 
to clean engine. 

(J) UNIT MC #80504: This unit out of service about 12 hours 
to- clean tubes. High chest pressure and erratic opera- 
tion were symptoms tljat such work was necessary. Unit had 
run very satisfactory and continuously for 14 days. 

(k) UNIT MC #80541; This unit shut down for about 10 hours 
to clean tubes . 

(1 > UNIT MC #59979 : This unit secured on 14 March due to 
compressor coupling trouble. Key had moved along ehaft 
and finally wore the keyway so large that.it became 
useless to do more work on the coupling. This trouble 
was detected on 12 March but attempts to correct same 
were not permanent. 

< m ) UNIT MC #58052: Unit shut down for about 8 hours to 
clean engine. 

M UNIT MC #805 54: Unit out of service approximately 1°, 
hours to clean engine and re-sweat leaking connection 
on exhaust heat exchanger. 

(o) UNIT MC #59955: Unit out of service approximately 4 '• 
hours to clean engine. 

(p) UNIT MC #50252: The unit operated very satisfactorily . J , 
but distillate production was only 50$ normal (est)* 
This trouble is diagnosed as poor compressor efficiency 
as is evidenced by sub-normal chest pressure. A re- 
placement unit or new compressor is indicated. 

4. General observations of past performance and recommendation? 
for future operations follow: 

(a) All engines becrme inefficient after about 500 hours 
operation. This seems to be caused by fouling in the 
combustion chamber due to high lead content of the gas- 
# . : , oline used. Lower octane gasoline would alleviate this 






... 

trouble. It should be remembered that these engines 
operate at about 220 degrees F. as compared to 160-180 
degrees in the ordinary truck engine using the same 80 
octane gasoline. Furthermore, manufacturer's specifi- 
cations as to capacity and general overall efficiency 
are based on 85-70 octane gasoline. An approximate 
efficiency ratio of gasoline to water is 1:65 for plan- 
ning requirement in fuel: 

(b) The present method of determining quantity of water dis- 
pensed is somewhat erroneous, i.e., for every four (4) 
five gallon cans delivered, credit is given for 20 gal- 
lons of water, whereas 21 gallons is actually received. 
In other words, the cans hold one quart more than nom- 
inal capacity when filled to overflowing which is usual 
practice. 

(c) Although no analysis was made, it was evident that the 
sea water in the immediate vicinity of two Jima is un- 
usually high in mineral content. This is borne out by 
the fact that all distillation units H scaled-up M aftei 1 
about 400 hours operation and in much shorter time if 
the sea water (at source) was warm. Apparent absence 
of usual marine life around the shore line, such as 
crabs, small fish, barnacles and even sea- weed might be 
considered further evidence of this high mineral content, 

(d) Inasmuch as quick scaling and inefficient operation of 
distillation units was experienced at Water Point No. 4 
when warm sea water was inadvertently used as a source, 
and at other water points on the island when hot brine 
w^s used, it is suggested that the E.M. Badger Co. be 
asked to recommend maximum sea water temperature con- 
sistent with efficient operation of their machines; 
such data to be published in a technical bulletin to- 
gether with the caution that water known to be highly 
mineralized (whether hot or cold) should be avoided if 
possible. 




APPENDIX 4 
ROAD CONSTRUCTION 



JwlQCNraUJ 

Fourth Engineer Battalion - Operation Report - IWO JIMA - (cont'd) 



I, RECONNAISSANCE PHASE . 

Continuous reconnaissance throughout the Division area was 
necessary to keep road construction and maintenance abreast of 

traffic requirements. 

All existing Jap roads were characteristically poor and would 
require rebuilding wherever used. 

Inland from the beach the terrain sloped up at approximately a 
20$ grade to Motoyama Airfields #1 and #2. The entire area' .!§;' over- 
laid with a deep deposit of volcanic ash which is incapable of 
sustaining heavy traffic. However, the material has very good drain- 
age properties and is well graded. 

The quarry located in target squares 183V/, X, was found to con- 
tain an unlimited deposit- of sand clay. Visual inspection of the 
material indicated that it had good binding quality and particle 
size distribution. -Further investigation indicated that it was the 
same material used by the Japs to sub-surface the local airfields, 
although they had used very little of it for road surfacing. 

It was evident on D/6 that the existing system was inadequate,, 
Beach and dump traffic moved slowly and with great effort through 
the loose ash* Congestion was universal. Roads were too few and 
too narrow, Additional beach, matting required to provide traction 
was., not .available and tracked vehicles were damaging- the matting 
already in place. 

II. ESTIMATE OF THE SITUATION . 

Efficient movement of traffic "throughout the Division zone 
made a planned two lane road net system imperative; road construction 
to start Immediately in the Division beach area and progress . 
forward to the vicinity, of battalion tJP^s'ae permitted by the 
tactical situation. All roads to be two lane (20 ft^minimum 
width) surfaced : construction = and maintained. 

To accomplish the above in the .most expeditious, manner, tjie 
following schedule of operations was inaugurated; . ; Priority of work 
as indicated:* 

1. Opening and .operating quarry. • , 

2. Construct lateral beach road connecting "Division 
dump and beaches; TA 165X;ty.R w Q,V* 1484,E. . . 



UN 




E 




ff0' m - ■ 



Fourth Engineer Battalion - Operation Report - I WO JIMA - (cont ! d) 



3, Improving and surfacing existing beach and dump * 
roads. TA 165J,0,S,T.f ,X. 

4, Construct new short cut roada in dump areas. 
TA 165I,N,S.W. 

5i Improve and surface road from Division Hospital 

; to quarry. TA 165K to CR 68. 
6* Improve and surface road from CR 58 to CR 249, 
7* Construct new road from RJ 184 to intersect with 

road passing through TA 165J. 
8. Improve and surface road from CR 249 to RJ 273 to 

Motoyama Airfield #2 (TA 183B), 
9 t Improve and surface road from CR 249 to CR 263 to 
Motoyama Airfield #1 (Ta 165C). 
10 f Improve and surface road from CR 58 to Brjub Disposal 

Dump (TA 167A) , 
11 # Improve and surface road from RJ 69 to Water Point 
#4" (TA 166H). 

12, Improve and surface road along south and west side 
of Motoyama Airfield #2 (TA 183B,C,D; 200Y,T.). 

13, Improve and surface roads in Division dump area 
(TA 148H,I,J). 

14 f Improve and surface road from water point #1, Ta 
to r«ad junction in TA 165, 

15, Construct dump access road for Provisional Battalion 
(TA 182R). 

16, Construct access roads to embarkation area (TA 165A 
to 165K). 



III. CONSTRUCTION DETAILS . 

During the period D/7 through D/24 approximately six miles of 
surf aced roads were constructed in the Fourth Division zone. The 
proximity of high grade natural materials made simplified, speedy 
construction methods appropriate. 

Although the volcanic ash had no lateral stability unless con- 
fined, it was ideal subgrade material where grade could be obtained 
without embankments. By careful planning only minor local cuts and 
fills were found necessary to secure satisfactory stability and 
alignment, TD-18 angle-dozers were used exclusively for this work 
with excellent results. 




- 33 - 




If //.If II ; 

talion - Operation Report'' - -itf&^MA «« • ( cont 1 d) 

T-he sand-clay surfacing: in- its natural state was deposited on 
the sub~grade from dump trucks, ,TD~18 angle-dozers spread the 
material in a single layer 3" to 6" thick, nfter a. few hours- of 
traffic compaction, graders, shaped the surface. Particle distribu- 
tion, moisture content and/cohesion of the natural material were such 
that a^good stable tractibn surface was obtained without mechanical 
stabilization or additional water. Heavy traffic and moderate rain- 
falls of two to three hours r duration had no deteriorating, effect 
during the time the roads were under observation. 

Maintenance requirements were moderate, one motor grader patrolled 
the roads daily shaping the 'surface and filling holes where nec-^ 
essary. Medium tanks and ara'ptitracs caused most of the s urf ace' d©*. . . 
fects. Continuous sprinkling with salt water prevented dusting: and 
raveling. This work was accomplished by. two improvised 20O0"galIon 
trailers. ~ " 

Enemy mines were a constant threat on sub-grade construction. 
All possible "precautions were taken and many mines were removed 
by probers working ahead of the equipment. No casualties, disabled 
equipment or appreciable lost time resulted from mines encountered 
on the roadwork described in this report. 

Quarrying operations were started on D^9 with the following 
equipment; One 3/8 yard shovel, one TD-9 shovel loader, one TD~18 
dozer and ten 2iT dump trucks, average daily production with this 
combination was approximately 400' loads or 1200 cubic yards. 

There were several quarry sites in the same vicinity which had 
been opened by the Japs* The one chosen initially had the advantage 
of shorter haul and was favored by. the tactical situation at this 
time. It had been worked extensively, and very little preparation 
was necessary. There was one, drawback in that the face was much too 
high for safe close-up operation. Benching by blasting and dozers 
proved impractical and when operation became dangerous She site was 
abandoned. However, several thousand loads of material were obtained 
from the floor and lower face before, this became necessary. 

The original reason for opening the quarry was to obtain sur- 
facing for roads in the Fourth Division area but it was soon supply- 
ing material for the airfield work and various other projects 
.throughout the Fifth Amphibious Corps area,- The original light 
equipment *was replaced by a It yard shovel and a 3/4 yard shovel 
to take care of the increased demand. 

NCUSSK 



4 m— «m *•* *Mt a-m mm mm mm . *mm 




- 34 - 



UNCJiSftnrr 

Fourth Engineer Battalion - Operation Report - IWO JIMA - (cont'd) 



One of the nearby sites was selected to provide material for the 
remaining work in the Fourth Division area* As in the previous case, 
extensive operations by the Japs had resulted in a very high face. 
The amount of material for estimated requirements did not warrant 
the use of benching methods. It was decided to work the floor and 

lower face again. The amount of preparation required to place the 
site in operation wats negligible and quarrying operations were 
started on D./17 with the following equipment*. Three TD-9 shovel 
loaders, one TD-18 angle-dozer, one ripper w/TD-18 utility tractor 
to rime mover and ten 2-g-T dump trucks. 

The material was so highly consolidated that the light shovel 
loaders did not have enough power to cut through it. The ripper 
and angle~dozer were able to keep a good stockpile of loose material 
ahead of the shovel loaders. When the project' was in full swing- 
daily production average was 300 to 350 loads. 





UMSfff 

1. Total length AT' 



engfh 6T*¥oad constructed (m^h 20 r *idthK. v -. .10,560 yds 

2. Total square yards road constructed, ... ,73,920 

3. Total cubic yards road surfacing material. . 9,000 

4. Total man hours on road construction . ♦ . . 1,250 

5. Total angledozer hours road construction 170 

6. Total grader hours on road construction* ♦ 45 

7. Total truck hours on road construction ........ 850 

8. Square yards of road constructed per man hour. ■..».. 59 

9. M « n 41 w "dozer 350 

10. " H M " " H grader 350 

11. « »i ft « u ti truck e7 

12. Total grader hours on road maintenance # . . 134 

13. " man it u « « 408 

14* * gals, water « M " . .. .64,000 

15* Square yards of road maintained per man hour 184 

16. rt M * tt « • grader hour. ... 551 

17. Gallons of water per square yard road maintenance* . . .9 
18 i Total yardage quarried 11,000 

19. Total man hours on quarry operation. 380 

20. ,f equipment hours on quarry operation 240 

21. 11 truck « " H * 1,300 

22. Yardage quarried per man hour. 30 

23. M w tt equipment hour 46 

24* " " * truck hour. . 8.4 




LABfilctrr* 



SECTION V 
COMMENTS AND RECOMMENDATIONS 




- Operation Report - IWO jfKf - -^ con£*d) 



1. COMMENT : The heavy angledozer tractor with armored cab again 
Droved its worth in this operation for pioneer road building 
in areas subject to sniper and sporadic mortar fire. For this 
operation, the number of armored cabs (5) carried by this bat- 
talion was adequate. Visibility from the present cab is poor. 
Excessive heat is developed inside the cab due to the lack of 

insulation between cab interior and 1 the engine. The interior 
of the cab for the TD-14 tractor with angledczer is too con- 
fined to permit the operator easy manipulation of the controls. 

RECOMMENDATION : Suggestions for improving the present armored 
cab will be submitted as a separate letter. 

2- COMMENT : This operation demonstrated an urgent need for a 

heavily armored tracked vehicle to aid in the assault of forti- 
fications requiring large explosive charges for demolition. Tfte 
Army Engineer Armored Vehicle modified from the medium tank is 
capable of carrying large quantities of explosives to a selected 
target for demolition in spite of heavy enemy concentration of 
small arms and light mortar fire. 

RECOMMENDATION : It is recommended that four U) Engineer Armor- 
ed Vehicles per division be procured for assignment to the 
Division Tank Battalion for operation by a tank-engineer team. 

3. COMMENT : In the training period prior to the operation and in 
the preparation of operation plans much lithographic reproduc- 
tion was done by this battalion in multiple copies requiring 
cutting. No means are provided in the Divisions for cutting 

paper stock except laborious trimming by hand. 

RECOMMENDATION ' It is urgently recommended that a paper cutter, 

hand operated, capable of handling the largest paper stock fur- 
nished the Engineer Battalion Reproduction Section be procured 
and issued on the basis of one (1) per Hq&Serv Company , Engineer 
Battalion, Marine. Division. 

4. COMMENT : It was once more forcibly impressed upon this battal- 
ion that the Browning Automatic Rifle and the bazooka, or rocket 
launcher, are indispensable in mopping-up operations against the 



- 3? - 



gmeer Battalion - Operation Report - IWO JIMA *~ (cont' d) 

^^- # - # * 

Japanese* Motroing-up against the Japanese may include anything 
from a. single wounded enemy soldier .with a hand grenade to a 
well armed and equipped force which has successfully laid low 
until the main infantry force has oassed by. Most mopt>ing~uo 
missions initially are squad tasks to t>ermit conralete coverage 

of extensive areas. The squad, therefore, should have the 
necessary roopt>ihg-*up weapons. 

RECOMMENDATION: (1) Browning Automatic Rifles should be allowed 
the Engineer Battalion, Marine Division, on the basis of one (l) 
t>er engineer squad* total of twenty-seven (27) for Engineer 
Battalion. (2) It is further recommended that the allowance of 
rocket launchers, AT, 2.56 inch, M1A1, for the Engineer Battalion 
be increased to one ll) per engineer squad or a total of twenty- 
seven (2?) per Engineer Battalion. 

COMMENT t The clearance of passages for tanks manually through 
enemy minefields while under fire is extremely costly in person- 
nel. Mine removal engineers must operate in an exposed position. 
They cannot use the mine detector while under fire since it is 
designed to be operated by a man in an upright position. 

RECOMMENDATION ; It is recommended that the "demolition snake" 
be procured and issued to the Marine Division for future opera- 
tions in an effort to decrease the cost in personnel of breach- 
ing passages through enemy fire-covered minefields. 

COMMENT: On this operation the five allowed TBX radios were 
used to good advantage. Two TBX f s were held at Battalion Head- 
quarters, one of which operated on the Division Logistic Net 
and the other was used on the battalion net. Each Company 
Headquarters had one set and was in communication at all times 
with the battalion. Ship to shore communication worked satis- 
factorily and in the early, days of the operation this kept 
Battalion Headquarters informed as to the situation ashore. 
Through this means, the battalion was informed of the fact that 
one company had lost all but one officer by D/2 and the battal- 
ion adjutant was sent ashore as replacement Company Commm der 

immediately. With the present allowance of radios, however," 
the platoon leaders have no communication with the Engineer 
Company Commander or with the Landing Team Commafider, With this 



condition in mind, it is deemed advisable to equip the platoons 
.and the Company Commander With SCR-500 radios. The Engineer 
Armored Vehicle should be equipped with SCR-508 radios to pro- 
vide communication with the tanks of the Tank Battalion* In 
order to provide communication between the Armored Vehicles and 
the Engineer Company Commander in the sector in which the vehicles 
are operating, it is desired to equip the Engineer Battalion 
with an SGRe.510 radio, with i ton 4x4 truck. The present num- 
ber of wire men is satisfactory, however, with the additional 
requested radio equipment, additional communication personnel 
will be required. 

RECOMMENDATION : It is recommended that the following personnel 
and main items of radio equipment be allowed an Engineer Battal- 
ion: 



EQUIPMENT 




REMARKS 



5 TBX radios 



10 



Used on l\ro Jima with 
excellent results. 



1 SCR-510 w/t ton 4x4 



Liaison set 



15 3CR-300 



15 



For use of platoons and 



3 



companies (l per Pit, 
2 per CoHq) 
NCO 1 s 



Wire equipment 



12 



Linemen and operators 



1 



Communication officer 



Total 



42 



- 39 - 



UNCUttJEL 



ANNEX "ABLE" 
ADMINISTRATION 




- Operation Report - IWO JIMA - (cont'd) 



1. The initial distribution of the personnel of the Fourth Engineer 
Battalion for the operation is shown in the attached Disposition of 
Personnel chart which indicates that the lettered engineer companies 
operated under normal CT attachments. Headquarters and Service Com- 
pany was retained under Division control through Support Group 
command. 

2. By noon of D-Day the engineer platoons of "a" and "C" companies, 
attached to their respective landing teams, x>rere ashore; the major- 
ity of the personnel in the Headquarters Platoons of "both companies 
were also ashore, having left small detachments on "board ship to 
handle equipment that had not yet been unloaded. On the evening of 
D~Day, Company "B M was ashore. Headquarters and Service Company 
landed on the morning of D/5 and by D/8 all detachments that were 
left aboard ship initially to unload equipment had landed. 

5. Total casualties suffered by this battalion during the opera- 
tion were 12 officers and 207 enlisted. The losa of trained special- 
ist personnel is shown in the thart containing the breakdown of 

casualties by specification serial number. Inspection of the casual- 
ty graphs reveals that "A" and "C" companies sustained their heavi- 
est losses on D-Day, and Company U B", landing with the reserve CT 
on D/l, also began to suffer heavy initial losses Boon after it had 
established itself ashore. These severe losses in the early stages 
of the operation are in accord with the experience of all units 
landing on the first two days on Fourth Division beaches. 

4. With the lettered engineer companies attached to combat t4ams, 
this battalion headquarters was responsible for the operation and 

administration of Headquarters and Service Company only. The let- 
tered engineer companies, which were required to submit daily 
strength and casualty reports to their combat teams, also submitted 
these reports to the Fourth Engineer Battalion Headquarters. 

5. The morale in this battalion remained high throughout the opera- 
tion, which fact is attributable to efficient handling by experi- 
enced company officers, employment in most instances on those 
specialized missions for which they had been trained* and prompt 
and abundant mail deliveries. 




DISPOSITION CF PERSONNEL OF ENGINEER BATTALION 
ON DIVISION SHIPPING 



CT 23 SHIPPING 



CT 24 SHIPPING 



CT 25 SHIPPING 



AFA-196 ("C" Co, HqPI) 
3 off. 31 «nl. 

m-ift co« latfi) 

1 off. a enl. 
APA-2P7 (»C» Co, 2ndP1) 



1 off. 



41 enl. 

("C Co, frflPl) 



1 off. 42 enl. 

APA-196 (B&S Co) -10 enl. 
(Water Supply Squad) 



ifA-33 CB" C9, BqPl) 
3 off. 17 enl. 

1 off. 43 enl. 

APA-ltt ("B" Co, fotfl) 

1 off. 48 enl. 

APA-2Q6 («B« go. ftgp 

2 off. 45 enl. 

Afi-tf ("P" QP, Hofl) 
4 enl. 

APA.33 (HfcS Co)-ll enl. 
(Water Supply Squad) 



APA-12Q («A» Co»Bttft3tfl) 
3 off. 73 enl. 

APA-1S7 (V CP* Igtfl) 
1 off. 43 enl. 

( w ft» Co, 3rflft) 
12 enl. 

LST-7?1 ("A" Co. 3rdPl) 



1 off. 



26 enl. 



APA-157 (H&S Co.-) 
14 off. 172 enl. 

AKA-65 (H&S Co.) 
4 off. 51 enl. 

AKA-21 jms Co.) 

5 enl. 

APA-120 (H&S Co) -10 enl. 
(Water Supply Squad) 



UlUJUJJrltll 



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TIME [DAYS] 



CASUALTY GRAPH 
COMPANY CilMM 



ANNEX "BAKER" 
' INTELLIGENCE 



Fourth Engineer Battalion,- Operation Report - I WO J IMA - (cont'd) 

I- ENGINEER INTSLLI PENCE . 

The information of engineering value, obtained from aerial photo- 
graphs and maps before D-Day, was as accurate as possible considering 
the small scale of the photographs and the difficult conditions under 
which they were taken* The camouflage recommendations determined 
from colored aerial film were accurate, but camouflage painting of 
vehicles and some camouflage net garnishing did not conform to the 
"mouse-gray" coloring of the terrain in the beach area. Camouflage 
discipline was generally satisfactory in the Divisional Zone con- 
sidering the number of troops and activities in the area. 

The few Japanese roads within the Division Zone proved, as ex- 
peoted, to be inadequate to handle the Divisional traffic. 

The quarry located in TAS 183X was opened and exploited by this 
battalion and provided sufficient borrow material for surfacing of 
131.71 sion roads, the 3rd and 4th Division cemeteries, extension of 
airfield runways and the reembarkation staging area. 

Aerial photographs showed numerous wells within the Division 
Zone; those tested were too brackish for drinking but safe for 
washing. It was reported that in TAS 182R the Japs had a large 
distillation plant but investigation by an" Engineer officer showed 
the plant to be a water pumping station. The Japs' principal source 
of fresh water appeared to be rainwater drained from airfields into 
concrete catchment basins. 

The lumber supply on the island was practically nil. Except for 
a few large pieces of heavy timber found in eastern boat basin, 
the Division supply of lumber for construction purposes was trans- 
ported to the island. 

Engineer reconnaissance in the forward areas was done by the 
engineer companies attached to the Regimental Combat Teams. In the 
rear areas, the reconnaissance of roads, possible water points, 
mined areas and mine fields, was made by Headquarters and S'ervice 
Company. 

II- MAPS AND PHOTOGRAPHS . 

The supply of maps and photographs was adequate. Due to the fact 
that the 1/5000 TA map (64th Topographic Battalion) was merely an 



- 1 - 




PWCTootTiL 

Fourth Engineer Battalion - Operation Report - I WO JIM - (cont'd) 



enlargement of the l/1000d.map, it showed no more detail than the 
1/10000 map. The other maps supplied this Division were as accurate 
as possible considering the high altitude at which the photographs 
were taken, the' tip and tilt of the photographs and the small over- 
lap between flights. The oombat teams had no vertical aerial photo- 
graphic coverage af ter D-Day. Aerial color film emphasizes detail 
more than ordinary film but no color film sorties were made avail- 
able to the pivision. 

III. MINES AND MINE FIELDS * 

See Appendix 2 to Section IV. 

IV. RECOMMENDATIONS . 

It is recommended that the enlarged 1/5000 TA map (64th Topo- 
graphic Bn). be eliminated in the future. - During ah operation 
frequent vertical aerial photographic missions should be flown. 
These photos • should be developed and printed and distributed to the 
combat teams for detailed study of the terrain to their front. 

Colored -aerial film strips (verticals) should be supplied to 
relief, mappers and mappers to further enhance the value obtained 
from maps and models having the correct terrain color* 



ANNEX «CH*BUE W 
OPERATIONS 



Fourth Engineer Battalion 



GENERAL 



This operation proved to be the first of its type for this Divi- 
sion wherein the Engineer Battalion Headquarters was able to func- 
tion strictly as engineers, without the numerous additional duties 
resulting from being engrossed in the functions of the Shore Party. 
It is believed that this most recent method of employment is an 
absolutely sound one in that it permits the utilization of Hq&Serv 
Company and a Battalion Headquarters for engineering in the Division- 
al rear area. Excellent supply roads, numerous beach egress roads, 
satisfactory rear area construction projects, proper supervision 
over utility requirements, and vital assistance, where needed, to 
support the combat team attached companies were all possible and 
y- . oliin the capabilities of this company due to the narrow Division 
zo:;e of action. Close contact with the engineer letter companies 
van maintained throughout the operation to attempt to foresee their 
ro'o.irements and to assist them in any way possible. 



CONSTRUCTION SECTION 



All job assignments, such as the building of the Division Hos- 
pital operating rooms or the construction of showers, were received 
by Battalion Headquarters and turned over to the Construction Offi- 
cer for action. Due to the fact that sufficient lumber was avail- 
able to this section for construction purposes, there was in no 
case any delay from the time of receipt of the mission to the time 
the work was started. 



WATER SUPPLY SQUADS 



These squads, being a part of the Equipment and Utilities 
Section, operated under the Of f ice r-in- Charge of that section. The 
functioning of this unit was considered satisfactory, thus maintain- 
ing their high standard of efficiency as shown, on Salpan and Tinian. 
They installed, repaired, maintained and operated all the units re- 
quired to supply the Division with a sufficient quantity of distill- 
ed water. No purified water was used on this operation since no 
fresh water sources were located* although eight portable units 
were on hand to exploit any likely sources. 
#• 

'"UWB 



* *_ _ 

- Operation Report - IWO JIMA - (cont'd) 




Fourth Engineer BattaliOh, - Operation Report^#D0 *■? (coat f d) , 

- - — - -niti- ? ci*vi# * 

It is believed that the Hq&Serv Company four squad vfeter sec- 
tion composed of all the water men in the battalion is a very 
satisfactory arrangement since, all operations are combined tinder 
one head. The dispersion resulting from temporarily attaching one 
squad to each letter company for transportation purposes to the 
target has worked satisfactorily an the past two operations, The 
water section allowance of 7 men per letter company and 6 men from 
Hq&ServCompany has been supplemented by approximately 50 additional 
men taken from other sections in the company, however, this does 
not appear satisfactory since it is expected that on large opera- 
tions these extra men would not be available. 



In addition to supervising the water section as described 
above, all Bq&Serv Company engineer equipment is placed under the 
control of this section. Data covering hours of operation and on 
preventative maintenance was recorded for all equipment. The 
assignment of operators and. reliefs for same during long operating 
hours was capably controlled, by this section. 



Although not- legally, recognized in the T/0 as a bonaf ide 
section under the control of: the Demolition Officer, a group of 
10 men were trained during the training period in mine removal and 
advanced engineer demolitions. Duty with this section in most cases 
was additional to their 'regular- duties a,nd on a volunteer basis. 
This section was used to remove minefields located in rear areas, 
to assist and supplement letter companies when required, and to 
accompany each piece of Hq&Serv Company equipment when operating 
to eliminate the possibility of visible mines being detonated by 
the equipment. This section:,./, although small in number was invalu- 
able to this battalion throughout the operation, 



EQUIPMENT AND UTILITY SECTION 



DEMOLITION SECTION 



- 2 - 




ID 



Fourth Engineer Battalion - Operation 1fepor-t ( . ~ IWO JIMA, (cont'd) 
* wW** ilJU M0T6R TRANSPORT SECTION 



The excellent dooperatlon of this section with all other 
sections in providing prompt and efficient transportation greatly 
speeded up all work in which this battalion was involved. Truck 
requests, in general, were made directly to the Motor Transport 
Officer who complied with them and shifted the personnel into re- 
lays in such manner that it can be said rarely during the daylight 
hours were any trucks idle except for the short time they were in 
for greasing, refueling or being checked-over for defects. This 
efficiency was particularly noticed in the dally number of loads 
which were hauled from the clay quarry* Despite the long hours of 
operation, the first echelon maintenance performed by thle section 
resulted in no losses to the equipment of this section throughout 
this operation. 



REPAIR SECTION 



Too much cannot be said of the excellent work performed by this 
section in this operation. Excellent specialized training, able 
leadership, and the ability to improvise, enabled this section to 
reembark from this well mined island with very little loss of 
equipment. An example of the excellent work performed by this 
section is demonstrated by the fact that despite the damage done 
to four TD-18 dozers by mines and Jap shelling which oaused the 
firing of two of these tractors, the battalion returned to the rest 
camp with five of the six TD-1S dozers Initially embarked. 



COMMUNICATION SECTION 



This section, recently reorganized, experienced little diffi- 
culty in maintaining both wire and radio communication with the 
equipment and personnel made available* However, expected demands 
which will be placed upon this battalion as extended engineering 



Fourth Engineer Battalion - Operation Report - I WO JIMA - (cont»d) 

missions no doubt will continue to gain in importance, substantiates 
the increase in personnel and equipment as recommended in Section V, 



LETTER COMPANIES 



The letter engineer companies were never under the operational 
control of the Engineer Battalion Headquarters. 'Throughout various 
periods during the operation the companies changed from operating 
as a company under the company commander to operating as three 
platoons, each receiving its orders directly from the Landing Team 
Commander to the engineer platoon leader. At times the platoons 
would take direct orders from the. rifle company commander in whose 
area they were working* In a few instances the engineer company 
commander employed the entire company at the direction and upon the 
order of one of the battalion commanders. At all times a small sec- 
tion of 5 or 6 men were attached to ee.oji infantry company for the 
purbose of immediately investigating mines or booby traps when and 
if found. 



' UNcuwe 



SUPPLY 




1. Prior to embarkation for the operation, the status of supply 
within this battalion was very good. All supplies and equipment 
were on hand to fill anticipated requirements for the operation. 
The motor transport vehicles and engineer equipment carried by this 
battalion are shown in the Vehicle Landing Chart. The fact that CT 
attachments were in effect necessitated the loading of equipment 
and supplies on 4 AKA's and 11 APA' s throughout the Division "ship- 
ping. (See Distribution of Engineer Equipment and Vehicle Chart. ) 

2. The supply problem confronting this battalion after landing was 
not a difficult one due to the fact that the lettered engineer com- 
viL%es remained attached to the CT's throughout the operation. Other 
trian the fact that there were too few sandbags available for protec- 
tion of the water distillation plants, supply presented no problem. 

3. Salvage commenced within .the battalion area on D/6 days and was 
conducted by a salvage section organized within Headquarters and 
Service Company consisting of one (l) NCO (Q>f Personnel) and a work- 
ing party of five (5) men. Many items of individual equipment and 
some weapons were salvaged and turned into the Division salvage dump. 
Salvage continued for four (4) days until the entire battalion area 
had been checked and all salvageable items removed. 

4. The total loss of engineer equipment and vehicles for this 
battalion during the operation was as follows: 



ITEM 


REMARKS 






1 -TRUCK, 2|T on, 6x6, cargo 


Was never 


landed on beach. 


1 -TRACTOR, hvy,w/ang doz (TD-18) 


Destroyed 


fey 


land mine. 


1 -TRACTOR, hvy ,w/ang doz (TD-14) 


Destroyed 


by 


land mine. 


*l-TRACTOR,lt,w/crane (TD-9) 


Destroyed 


on 


beach by shell. 


*1-SH0YEL, 3/8 cubic yard 


Destroyed 


on 


beach by shell. 


*NOTE: This equipment 


was attached 


to 





the 4th Pioneer Battalion for 
"use on Shore Party work. 

Parts from the above vehicles were salvaged and used to repair other 
vehicles during the operation. 






Fourth Engineer Battalion - Operation R e port -*:ftfo*afc : MA - (£o#t { d) 



5. The road net in the Division zone of action was such, that all 
points were accessible. All roads were of sufficient width and sur- 
faced so as to permit- two-way traffic in all types of .weather. 

F.s'tablishment of traffic control points at all major intersec- 
tions ir. .the Division zone, manned by experienced military • pclioe , . 
fjervei' to maintain a smooth flow of traffic at all times, Pscpite ' • 
oh:- volume, of traffic, the road net was adequate to .support t u ;o 
operation ' and the problem of traffic circulation never became serious 



2 - 




EXPENDITURE OF EXPLOSIVES DURING OPERATION 



ITEM MOUNT EXPENDED 

CAPS, blasting, special, electric . 9,775 

CAPS, blasting, special, non-electric . 40,000 

CORD, detonating, 100ft spools (spools). . 1,630 

DETONATOR, 15-second delay, M-l 5,682 

EXPLOSIVE, C-2 (pounds). . 75,000 

EXPLOSIVE, demol, chain of eight blocks, M-l. . . . 440 

EXPLOSIVE, shaped- charge, 401b, T-3 178 

EXPLOSIVE, TNT, ilb block, (pounds). . 28,080 

FUZE, blasting, time . (feet) . . 92,200 

LIGHTERS ; fuze 15,000 

TORPEDOES, bangalore, M1A1, ...... (sections) 2,020 



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| TRACTOR, heavy, w/clam shovel. * 


1 WATER PURIFICATION UNIT.' port. 


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to 

o 
o 


1 TRAILER, 1-ton, 2-W, stockroom. 


1 TRAILER, 1-ton, 2-W, greasing. 


I TRAILER, 1-ton, 2-W, water. 


►-3 
M 

E 

PC 

H 
1 

o 

PJ 

to 
o 

& 
O 
• 


►-3 

M 

O 

to 

a 


•-3 

o 

• 

to 
tor 
I 

s 

* 
w 

a> 
o 
?r 

H* 

eg 

• 


h3 

O 

to 
l 

C+ 

O 

P5 

» 

o 

O 

• 


i 

o 

* 

to 

M»- 

1 

d- 
O 

P3 

o 

w 

PL 

. 


h8 

O 
• 

1 

c+ 
O 
PS 
» 

1 

o 

135 

O 
. 


f-3 

& 
O 

1 

c+ 
O 

P3 


c 

a 
W 

J^- 

c+ 

O 

C3 

% 

• 


31 

* 




n» 


r 






























































H&S Co, 





r 

D 


>■ 


























(— ' 




































Co A 




s 
































































Co B 






5 

D 


























1— 1 




































Co C 




ar 


I" 

? 


























to 




































TOTAL 




1 

*- 
































































HScS Co 






3 


























H 




































Co A 




































































Co B 




































































Co C 
































to 




































TOTAL 




































































HScS Co 






1— 






























































Co A 




































































Co B 




































































Co C 
































to 




































TOTAL 






























■— 






































H&S Co 
































H 




































CO A 


























H 




























I— 1 






1-" 




H 




Co B 
































H 




































Co C 


























1— ' 






to 




























H 




M 




TOTAL 




































































H&S Co 
































H 




































Co A 


























l- J 




























to 






H 




to 




Co B 
































M 






















H 1 








J— 1 


^* 




Co C 


























H 






to 






















V*) 






H 


t— 1 


P- 




TOTAL 




























H 


























H 






Vo 




1— 1 




H&S Co 
































H 
































■P- 




Co A 


























H 






H> 


















H 




to 






to 


to 


to 




Co B 
































M 






















H 








l- 1 


to 




Co C 




























H 




VjJ 




u> 


















-J 






vn 


VO 


vO 




TOTAL 
























NO 




























M 


H 




H 


-J 


vo 


VO 




H&S Co 


























H 






H 


















H 




VjO 






Vo 


to 


■P- 




Co A 


























H 
























to 




VO 






VO 


to 


■P- 




Co B 


























H 






M 






















to 










VO 




Co C 














u> 












Vo 


»-> 




U> 


















u> 


M 


NO 




H 




CO 


^ 




TOTAL 














On 










to 




\-> 








o^ 








H 


k-> 




to 


U> 


to 


H 


to 




o 


■p- 




H&S Co 


























H 






H 


















H 


to 


Va> 






vo 


to 


p- 




Co A 


























H 






H 1 


















to 


to 


V*3 






vo 


to 


-p- 




Co B 




















































h-> 


V*) 








to 


p- 




Co C 














o 












VJ 


\-> 




VjJ 




o 








H 


H 






CO 




H 


to 


CO 


« 


H 
O 




TOTAL 














CO 


H 


to 




H 


to 
P- 


H 


H 






to 


o 


H 






H 


H 


i— 1 


to 




UJ 


l-» 




c 


o 


P~ 


H 


HfeS Co 


























H 






H 


















H 


to 


VjJ 






VO 


to 


P- 




Co A 
































H 


















to 


to 


U) 






vo 


to 


P- 




Co B 


























H 


























to 


Vo 






vo 


to 


P- 




Co C 














CO 


H 


to 


H 


H 


£ 


P~ 


H-* 


H 




to 


o 


H 


H 1 




H 


H» 


M 


o» 


vO 


H 
to 


H 


v«> 


to 
H 




H 
O 




TOTAL 














09 


I-* 


to 


H 


H 


to 




H 


»-* 




to 


o 


l-» 






to 


l-» 


H 


u> 


u> 


Lo 


H 


LO 




o> 


P- 


H 


H&S Co 


























H* 
























H-» 


to 


CO 






vo 


to 


P" 




Co A 


























(— 1 
























to 


to 


LO 








to 


P- 




Co B 


















































H 


to 


U> 








to 


P- 




Co C . 














co 


H 


to 


I- 1 


H 


ii 


P- 


H 


H 


oJ 


to 


o 


H 


H 


l- i 


to 


H 


H ■ 


-O 


■sO 


-» 

to 


H 




to 

M 


to 


£ 




TOTAL* 














CO 


H 


to 


I- 1 


H 


O 


I- 1 


M 


H 




to 




M 


H 


H 


to 


H 


H » 


oo 






H 


oJ 


H* 

>o 


o 


P- 


M 


f 

H&S'Co 


























H 






H 


















H 


to 


u0 








to 


P- 






Co A, 


























H 






h* 


















to 


to 


kA> 






uO 


to 


P- 




Co^» , 




i 






















(— 1 






H 


















to 


to 










to 


P- 


















CO 


H 


to 


H 


H 


o. 


p- 




H 




to 




H 




H 


to 


-• 1 




y> 




-» 

to 


-< 




to 


— \ 

v> 


H 


H 





■sr 
S 



to 



CT 23 SHIPPING 



CT 24 SHIPPING 



CT 25 SHIPPING 



AIM.? 6 ( Y fiii Battl ftili) 

1 TRACTOR, hvy, w/doz bade dump scrap. 
1 TRAILER, 1-ton, 2-W, oar go. 

1 TRUCK, 4-ton, 4x4. 

2 TRAILERS, 1-ton, 2-W, water. 

3 TRUCKS, 24-ton, 6x6, dump. 

^KA^^C^JjCjMjOjJ^Plt^ 

1 TRAILER, 1-ton, 2-W, cargo. 

2 TRUCKS, 1-ton, 4x4, oar go. 
1 COMPRESSOR, air, 105 cfm. 
7 WATER DISTILLATION PLANTS. 
1 TRUCK, 24-ton, 6x6, cargo. 

APA-158 ("C" Co. latPlt Equip) 

1 TRUCK, 4-ton, 4x4. 

1 TRAILER, i-ton, 2-W, dump. 

APA-207_j ( ||£^Co^ndPl^E^u^ 

1 TRUCK, 4-ton, 4x4. 

1 TRAILER, -J-ton, 2-W, dump. 

APA-154 ("C* Co. 3rdplt Equip) 

1 TRUCK, 4-ton, 4x4. 

1 TRAILER, £-ton, 2-W, dump. 



^£j6 | 5j[H&Sjgo fc J^u££^ 

1 AMBULANCE, 4-ton, 4x4. 

6 TRACTORS, hvy, w/ang. dozer (TD-18) . 

2 TRACTORS, hvy, w/PCU. 

1 TRACTOR, light, w/doz shovel. 
1 TRACTOR, airborne. 

3 TRAILERS, -£-ton, 2-W, dump. 
3 TRAILERS, 1-ton, 2-W, cargo. 

1 TRAILER, 1-ton, 2-W, greasing. 

1 TRAILER, 1-ton, 2-W, stockroom. 
3 TRAILERS, 1-ton, 2-W, water. 

1 TRAILER, 2-ton, 4-W, oar go. 

2 TRAILER, 2-ton, 4-W, stockroom. 
1 TRAILER, 5-ton, 4-W, mach. shop. 

3 TRUCKS, 4- ton, 4x4. 

6 TRUCKS, 1-ton, 4x4, cargo. 
1 TRUCK, 24-ton, 6x6, cargo. 

12 TRUCKS, 2^- ton, 6x6, dump. 
1 TRUCK, 24-ton, 6x6, wrecking. 
1 COMPRESSOR, air, 105 cfm. 
9 WATER DISTILLATION PLANTS. 

1 RIPPER, 2-wheel. 

2 SCRAPERS, 4-whl, FD 8 cu. yd. 

APA-a^^^^B^lt^uip^ 

1 TRUCK, 4-ton, 4x4. 

1 TRUCK, 24-ton, 6x6, oargo. 

7 WATER DISTILLATION PLANTS. 

AK-65 (»B» Co. HqPlt Equip) 

1 TRACTOR, hvy, w/doz back dump scrap 

2 TRUCKS, 1-ton, 4x4, oargo. 

2 TRAILERS, 1-ton, 2-W, oargo. 

APA-118 («B« Co. latPlt BquipJ 

1 TRUCK, 24-ton, 6x6, dump. 
1 COMPRESSOR, air, 105 cfm. 
1 TRUCK, 4-ton, 4x4. 
1 TRAILER, i-ton, 2-W, dump. 

1 TRUCK, 24-ton, 6x6, dump. 
1 TRUCK, 4-ton, 4x4. 
1 TRAILER, 1-ton, 2-W, water. 
1 TRAILER, ^-ton, 2-W, dump. 

APA-206 ( W B W Co. 3rdFlt Equip) 

1 TRUCK, 2^-ton, 6x6, dump. 
1 TRUCK, 4-ton, 4x4. 
1 TRAILER, 1-ton, 2-W, water. 
1 TRAILER, 4-ton, 2HT, dump. 



APA-1S7 f«| Co. Enui^ 
1 TRUCK, 4- ton, 4x4. 

APA-120 (»A» Co. HqPlt Equip) 

1 TRACTOR, hvy, w/doz back dump scrap. 

2 TRAILERS, 1-ton, 2-W, oargo. 

1 TRUCK, 4" ton, 4x4. 

2 TRUCKS, 1-ton, 4x4, cargo. 

3 TRUCKS, 24-ton, 6x6, dump 
1 COMPRESSOR, air, 105 cfm. 
1 TRUCK, 24-ton, 6x6, cargo. 
5 WATER DISTILLATION PLANTS. 

1 TRAILER, 1-ton, 2-W, water. 

AKA-66 ("A" Co. HqPlt Equip) 

2 WATER DISTILLATION PLANTS. 

APA^jM^JJAJMSa^ 

1 TRUCK, 4-ton, 4x4. 

1 TRAILER, 4-ton, 2-W, dump. 

AJfiJ-jL20jJ|Aj^C^^ 

1 TRUCK, 4~*on, 4x4. 

1 TRAILER, 4~t°n, 2-W, dump. 

APA-163 ("A* Co. 3rdPlt Equip) 

1 TRUCK, 4" ton, 4x4* 

1 TRAILER, 4~ton, 2-W, dump. 



NOTE: The- following H&S Co. Equip- 
ment was embarked aboard 
AK-67* 

1 TRAILER, 15-ton, machinery. 

1 GRADER, road, 4-whl, self -propel. 

1 GRADER, road, leaning whl, pull. 



1 It in 1 .1 n .n mi- ir- n